A Rigorous Look at Verbal Abilities With The JCWS at Cogn-IQ.org

The Jouve-Cerebrals Word Similarities (JCWS) test emerges as a nuanced tool in the assessment of vocabulary and reasoning within a verbal context. In this paper, we delve into the psychometric properties of the JCWS, specifically, its first subtest, which is rooted in the Word Similarities test from the Cerebrals Contest. Exhibiting exceptional reliability (Cronbach's alpha of .96) and pronounced item discrimination, the CCWS proves to be a robust measure of verbal-crystallized ability, as evidenced by its significant correlations with WAIS scores. 

The JCWS subtests, in their entirety, display impressive internal consistency and reliability, marked by a split-half coefficient of .98 and a Spearman-Brown prophecy coefficient of .99. 

While these findings underscore the JCWS’s potential as a reliable instrument for evaluating verbal abilities, it is crucial to acknowledge the limitations present in this study, such as the small sample size used for assessing internal consistency and concurrent validity across the complete JCWS. The need for further research is evident, aiming to extend the evaluation of the JCWS’s validity and explore its applicability across diverse settings and populations. 

This article highlights the JCWS’s promise as an evaluative tool for verbal ability, potentially serving a pivotal role in both academic and clinical spheres, contingent upon further validation and exploration. 

Link to Full Article: Jouve, X. (2023) Psychometric Properties Of The Jouve-Cerebrals Word Similarities Test: An Evaluation Of Vocabulary And Verbal Reasoning Abilities. https://www.cogn-iq.org/articles/word-similarities-iq-test-psychometric-properties.html

Assessing Verbal Intelligence with the IAW Test at Cogn-IQ.org

The I Am a Word (IAW) test represents a unique approach in the domain of verbal ability assessment, emphasizing an open-ended and untimed format to encourage genuine responses and cater to a diverse range of examinees. 

This study delved into the psychometric properties of the IAW test, with a sample of 1,083 participants from its 2023 revision. The findings attest to the test’s robust internal consistency and its strong concurrent validity when correlated with established measures such as the WAIS-III VCI and the RIAS VIX. 

These promising results suggest that the IAW test holds considerable potential as a reliable, valid, and inclusive tool in the field of intelligence assessment, fostering a more engaging and equitable testing environment. 

Despite its strengths, the study acknowledges certain limitations, including a modest sample size for concurrent validity analyses and the absence of test-retest reliability analysis, pointing towards avenues for future research to fortify the test’s psychometric standing and broaden its applicability across diverse domains and populations. 

The IAW test emerges not just as a measure of verbal intelligence, but as a testament to the evolving landscape of cognitive assessment, aiming for inclusivity, engagement, and precision. 

Link to Full Article: Jouve, X. (2023) I Am a Word Test: An Open-Ended And Untimed Approach To Verbal Ability Assessment. https://www.cogn-iq.org/articles/i-am-a-word-test-open-ended-untimed-verbal-ability-assessment-reliability-validity-standard-score-comparisons.html

[Article Review] Revolutionizing Need for Cognition Assessment: Unveiling the Efficient NCS-6

Reference

Coelho, G. L. d. H., Hanel, P. H. P., & Wolf, L. J. (2018). The Very Efficient Assessment of Need for Cognition: Developing a Six-Item Version. Assessment, 27(8), 1870-1885. https://doi.org/10.1177/1073191118793208

Review

In the article, "The Very Efficient Assessment of Need for Cognition: Developing a Six-Item Version" by Coelho, Hanel, and Wolf (2018), the authors introduce a shortened version of the Need for Cognition Scale (NCS-18) called the NCS-6. The need for cognition refers to people's tendency to engage in and enjoy thinking, which has become influential across social and medical sciences. Using three samples from the United States and the United Kingdom (N = 1,596), the researchers reduced the number of items from 18 to 6 based on various criteria such as discrimination values, threshold levels, measurement precision, item-total correlations, and factor loadings.

The authors then confirmed the one-factor structure and established measurement invariance across countries and gender. They demonstrated that while the NCS-6 provides significant time savings, it comes at a minimal cost in terms of its construct validity with external variables such as openness, cognitive reflection test, and need for affect. This suggests that the NCS-6 is a parsimonious, reliable, and valid measure of the need for cognition.

In conclusion, Coelho et al.'s (2018) article provides valuable insights into the development of a more efficient measure of the need for cognition. The NCS-6 not only reduces the time required for assessment but also maintains the validity and reliability of the original scale. This study contributes to the understanding and measurement of need for cognition, which has implications for various fields, including social and medical sciences.

Revising the Epreuve de Performance Cognitive: Psychometric Properties of the Revised Nonverbal, Sequential Reasoning Test

Abstract

This study aimed to revise the Epreuve de Performance Cognitive (EPC), a nonverbal, sequential reasoning test, by incorporating a stopping requirement after five consecutive misses, and to evaluate the psychometric properties of the revised EPC. Data from 1,764 test takers were analyzed using various statistical methods. The revised EPC demonstrated high reliability, with a reliability coefficient of .94 and a Cronbach's alpha of .92. Multidimensional scaling analysis confirmed the existence of a continuum of item difficulty, and factor analysis revealed a strong relationship between the revised EPC and Scholastic Assessment Test (SAT) scores, supporting construct validity. The revised EPC also showed high correlations with other cognitive measures, indicating convergent validity. Despite some limitations, the revised EPC exhibits robust psychometric properties, making it a useful tool for assessing problem-solving ability in average and gifted adults. Future research should address study limitations and investigate the impact of timed versus liberally timed conditions on test performance.

Keywords: Epreuve de Performance Cognitive, revised EPC, nonverbal reasoning, sequential reasoning, psychometric properties, reliability, validity.

Introduction

Psychometrics is a vital field within psychological research, focusing on the theory and techniques involved in psychological measurement, particularly the design, interpretation, and validation of psychological tests. The study of the psychometric properties of tests is crucial for ensuring their reliability, validity, and accuracy in assessing the intended psychological constructs. The present study aims to revise the Epreuve de Performance Cognitive (EPC), a nonverbal, sequential reasoning test, and investigate its psychometric properties.

Sequential reasoning tests are designed to assess an individual's ability to understand and predict patterns, sequences, and relationships (DeShon, Chan, & Weissbein, 1995). These tests have been widely used in different contexts, including assessing cognitive abilities, aptitude, and intelligence (Carroll, 1993). The original EPC has been employed in various research contexts, including studies on problem-solving, and giftedness (Jouve, 2005). However, the test's stopping criterion has been a topic of debate, with some researchers arguing that it may limit the test's effectiveness in distinguishing between high and low performers.

The present study aims to address this concern by adding a stopping requirement after five consecutive misses to the EPC, thereby revising the test. The rationale behind this revision is to minimize potential fatigue and frustration associated with attempting numerous difficult items without success. To assess the psychometric properties of the revised EPC, the study employs various statistical techniques, including the Spearman-Brown corrected Split-Half formula (Brown, 1910; Spearman, 1910), Cronbach's alpha (Cronbach, 1951), multidimensional scaling analysis, principal components factor analysis, and correlation analysis (Nunnally & Bernstein, 1994).

The reliability and validity of the revised EPC are of utmost importance for its potential applications in research and practice. Previous studies have utilized the EPC as a measure of cognitive abilities, such as problem-solving and time for taking the test (Jouve, 2005). Moreover, the EPC has been used in studies with gifted individuals, highlighting its potential to identify high-performing individuals (Jouve, 2005). The study's primary objective is to assess the reliability and validity of the revised EPC and compare its psychometric properties to well-established tests, such as Raven's Advanced Progressive Matrices (Raven et al., 1998), Cattell's Culture-Fair Intelligence Test-3A (Cattell & Cattell, 1973), and the Scholastic Assessment Test (SAT) (College Board, 2010).

This study seeks to address the potential limitations of the original EPC by revising the test and adding a stopping requirement after five consecutive misses. The main goal is to investigate the psychometric properties of the revised EPC, focusing on its reliability, validity, and relationship with other established cognitive measures. By providing a comprehensive analysis of the revised EPC's psychometric properties, this study aims to contribute to the literature on sequential reasoning tests and their potential applications in research and practice.

Method

Research Design

The current study utilized a quasi-experimental design to revise the Epreuve de Performance Cognitive (EPC), a nonverbal, sequential reasoning test, and to evaluate its psychometric properties (Blair & Raver, 2012). Specifically, a stopping requirement was added, where the test would be terminated after five consecutive misses, and the resulting test scores were compared to other established cognitive measures.

Participants

A total of 1,764 participants, who completed the revised EPC, were included in this study. No exclusion criteria were set.

Materials

The revised EPC was employed as the primary measure for this study. The original EPC is a nonverbal, sequential reasoning test that assesses problem-solving ability (Jouve, 2005). Modifications to the original EPC included the addition of a stopping requirement after five consecutive misses. The revised EPC was then compared to other well-established cognitive measures, such as Raven's Advanced Progressive Matrices (APM; Raven, 1998), Cattell's Culture-Fair Intelligence Test-3A (CFIT; Cattell & Cattell, 1973), and the Wechsler Adult Intelligence Scale (WAIS; Wechsler, 1997), to establish convergent validity.

Procedures

Upon obtaining informed consent, participants were administered the revised EPC individually. The revised EPC is computerized and consisted of 35 items, with participants instructed to complete as many items as possible under liberally timed conditions. To ensure data quality, the stopping requirement was implemented, terminating the test after five consecutive misses. For the convergent validity studies, participants were then asked to complete the APM, CFIT, or WAIS. When possible, participants were asked to report their previous scores, especially on college admission tests, such as the SAT.

Statistical Analyses

The data were analyzed using various statistical techniques, such as the Spearman-Brown corrected Split-Half formula, Cronbach's alpha, multidimensional scaling analysis, principal components factor analysis, and correlation analysis. The Spearman-Brown formula and Cronbach's alpha were used to assess the reliability of the revised EPC scores, while multidimensional scaling analysis was employed to examine the test's structure with ALSCAL (Young et al., 1978). Principal components factor analysis was conducted to establish construct validity, and correlation analysis was used to determine the convergent validity of the revised EPC with other cognitive measures. Apart from MDS, all the analyses were carried out with Excel.

Results

Statistical Analyses

The goal of this study was to revise the Epreuve de Performance Cognitive (EPC), a nonverbal, sequential reasoning test, by adding a stopping requirement after five consecutive misses, and to examine the psychometric properties of the revised EPC. The data collected from 1,764 test takers were analyzed using various statistical tests, including the Spearman-Brown corrected Split-Half formula, Cronbach's alpha, multidimensional scaling analysis, principal components factor analysis, and correlation analysis.

Reliability of the Revised EPC

The reliability of the scores yielded by the revised EPC was assessed using the Spearman-Brown corrected Split-Half formula and Cronbach's alpha. The entire sample of 1,764 test takers yielded a reliability coefficient of .94, calculated using the Spearman-Brown formula, indicating a high level of internal consistency. Additionally, Cronbach's alpha was found to be .92, further supporting the reliability of the revised EPC.

Multidimensional Scaling Analysis

A multidimensional scaling analysis was conducted to confirm the existence of a continuum in items from the easiest to the hardest. The two-dimensional solution appeared in a typical horseshoe shape, as shown in Figure 1, with a Stress value of .14 and an RSQ of .92. These results suggest that the revised EPC has a coherent structure in terms of item difficulty.

Figure 1. Two-dimensional scaling for the Items of the Revised EPC.

Note. N = 1,764. Root Squared Mean (RSQ) = .92. Kruskal's Stress = .14.

Factor Analysis

A principal components factor analysis was performed using the data of 95 participants who reported recentered Scholastic Assessment Test (SAT) scores. The first unrotated factor loading for the revised EPC was .83. The Math reasoning scale of the SAT loaded at .82, and the Verbal reasoning part at .75. This indicates that the EPC shares considerable variance with the SAT, supporting its construct validity.

Correlations with Other Measures

The revised EPC raw scores were found to have high correlations with other cognitive measures. A correlation of .82 was observed between the EPC raw scores and the Raven's Advanced Progressive Matrices (APM) in a sample of 134 subjects, while a correlation of .81 was found between the EPC raw scores and the Cattell's Culture-Fair Intelligence Test-3A (CFIT) in a sample of 156 observations. Additionally, a correlation of .85 was found between the EPC raw scores and the Full Scale IQ (FSIQ) on the Wechsler Adult Intelligence Scale (WAIS) in a highly selective sample of 23 adults with an average FSIQ of 131.70 (SD=24.35). These results demonstrate the convergent validity of the revised EPC.

Limitations

Despite the promising results, some limitations should be considered. First, the sample size of certain sub-analyses (e.g., the correlation with FSIQ on the WAIS) was relatively small, which may limit the generalizability of the findings. Second, the study did not explore potential differences between timed and liberally timed conditions, which could provide further insight into the performance of the revised EPC.

The revised EPC, with the addition of a stopping requirement after five consecutive misses, demonstrated strong psychometric properties, including high reliability and convergent validity. The multidimensional scaling analysis confirmed the existence of a continuum in items from the easiest to the hardest, and the factor analysis demonstrated the construct validity of the revised EPC in relation to the SAT. These results support the utility of the revised EPC for assessing problem-solving ability in individuals of average ability level and gifted adults. Further research should address the limitations of the current study and explore the potential impact of timed versus liberally timed conditions on the revised EPC performance.

Discussion

Interpretation of Study Results and Relation to Previous Research

The main objective of this study was to revise the Epreuve de Performance Cognitive (EPC; Jouve, 2005) by implementing a stopping requirement after five consecutive misses and to evaluate its psychometric properties. The results indicate that the revised EPC possesses high reliability, as demonstrated by a Spearman-Brown corrected Split-Half formula coefficient of .94 and a Cronbach's alpha of .92. These findings align with previous research emphasizing the importance of test reliability in psychological assessments (Nunnally, 1978).

The multidimensional scaling analysis revealed a coherent structure in terms of item difficulty, confirming the existence of a continuum from the easiest to the hardest items. This result is consistent with prior studies that have employed multidimensional scaling analysis to identify the underlying structure of cognitive test items (Thiébaut, 2000). Furthermore, the factor analysis indicated that the revised EPC shares substantial variance with the SAT (College Board, 2010), thus supporting its construct validity. These findings are in line with previous research establishing the validity of cognitive tests in measuring problem-solving abilities (Carroll, 1993).

Implications for Theory, Practice, and Future Research

The strong psychometric properties of the revised EPC, including its high reliability and convergent validity, have significant implications for both theory and practice. The revised EPC can serve as a useful tool for assessing problem-solving ability in individuals of average ability level and gifted adults, potentially informing educational and occupational decision-making processes (Lubinski & Benbow, 2006). Moreover, the positive relationship between the revised EPC and established cognitive measures, such as the SAT, Raven's APM, CFIT, and WAIS, further substantiates the relevance of nonverbal, sequential reasoning tests in cognitive assessment (Sternberg, 2003).

Given the current findings, future research could explore the impact of time constraints on EPC performance, as the present study did not investigate potential differences between timed and liberally timed conditions. Additionally, researchers could examine the applicability of the revised EPC in diverse populations and settings, such as in clinical or cross-cultural contexts (Van de Vijver & Tanzer, 2004).

Limitations and Alternative Explanations

Despite the promising results, this study has some limitations that may affect the generalizability of the findings. First, the sample size for certain sub-analyses (e.g., the correlation with FSIQ on the WAIS) was relatively small, potentially limiting the robustness of these results (Cohen, 1988). Second, the study did not investigate the potential impact of timed versus liberally timed conditions on the revised EPC performance, which could provide valuable insights into the test's utility in various contexts (Ackerman & Kanfer, 2009).

Future Directions

The revised EPC, with the addition of a stopping requirement after five consecutive misses, demonstrated strong psychometric properties, including high reliability and convergent validity. The findings support the utility of the revised EPC in assessing problem-solving ability in individuals of average ability level and gifted adults. Future research should address the limitations of the current study, explore the potential impact of timed versus liberally timed conditions on the revised EPC performance, and investigate its applicability in diverse populations and settings (Sackett & Wilk, 1994).

Conclusion

This study successfully revised the Epreuve de Performance Cognitive (EPC) by adding a stopping requirement after five consecutive misses and demonstrated strong psychometric properties for the revised test. The reliability and convergent validity of the revised EPC were found to be high, and the multidimensional scaling analysis supported its coherent structure regarding item difficulty. Additionally, the factor analysis showed a strong relationship between the revised EPC and SAT scores, further establishing its construct validity.

These findings have important implications for the broader field of cognitive assessment, as the revised EPC offers a reliable and valid measure of problem-solving abilities for both average ability-level individuals and gifted adults. However, this study has some limitations, such as relatively small sample sizes in certain sub-analyses and the lack of investigation into potential differences between timed and liberally timed conditions.

Future research should address these limitations and explore the impact of timing conditions on the revised EPC performance. Overall, the revised EPC presents a valuable tool for cognitive assessment, and its continued refinement and investigation will contribute to the advancement of the field.

References

Ackerman, P. L., & Kanfer, R. (2009). Test length and cognitive fatigue: an empirical examination of effects on performance and test-taker reactions. Journal of experimental psychology. Applied, 15(2), 163–181. https://doi.org/10.1037/a0015719

Brown, W. (1910). Some Experimental Results in the Correlation of Mental Abilities. British Journal of Psychology, 3, 296-322. https://doi.org/10.1111/j.2044-8295.1910.tb00207.x

Carroll, J. B. (1993). Human cognitive abilities: A survey of factor-analytic studies. New York: Cambridge University Press. https://doi.org/10.1017/CBO9780511571312

Cattell, R. B., & Cattell, A. K. S. (1973). Technical supplement for the culture fair intelligence tests: Scales 2 and 3. Champaign, IL: Institute for Personality and Ability Testing.

Cohen, J. (1988). Statistical Power Analysis for the Behavioral Sciences (2nd ed.). Hillsdale, NJ: Lawrence Erlbaum Associates.

College Board. (2010). The SAT® test: Overview. Retrieved from https://collegereadiness.collegeboard.org/sat

Cronbach, L. J. (1951). Coefficient alpha and the internal structure of tests. Psychometrika, 16(3), 297-334. https://doi.org/10.1007/BF02310555

DeShon, R. P., Chan, D., & Weissbein, D. A. (1995). Verbal overshadowing effects on Raven's Advanced Progressive Matrices: Evidence for multidimensional performance determinants. Intelligence, 21(2), 135–155. https://doi.org/10.1016/0160-2896(95)90023-3

Jouve, X. (2005). Epreuve de Performance Cognitive (EPC). Paris, FR: Editions du Centre de Psychologie Appliquée.

Lubinski, D., & Benbow, C. P. (2006). Study of Mathematically Precocious Youth After 35 Years: Uncovering Antecedents for the Development of Math-Science Expertise. Perspectives on Psychological Science, 1(4), 316–345. https://doi.org/10.1111/j.1745-6916.2006.00019.x

Nunnally, J. C., & Bernstein, I. H. (1994). Psychometric theory (3rd ed.). New York: McGraw-Hill. https://doi.org/10.1177/014662169501900308

Raven, J., Raven, J. C., & Court, J. H. (1998). Raven Manual: Section 4, Advanced Progressive Matrices, 1998 Edition. Oxford, UK: Oxford Psychologists Press.

Sackett, P. R., & Wilk, S. L. (1994). Within-group norming and other forms of score adjustment in preemployment testing. American Psychologist, 49(11), 929–954. https://doi.org/10.1037/0003-066X.49.11.929

Spearman, C. (1910). Correlation calculated from faulty data. British Journal of Psychology, 3(3), 271-295. https://doi.org/10.1111/j.2044-8295.1910.tb00206.x

Sternberg, R. J. (2003). A Broad View of Intelligence: The Theory of Successful Intelligence. Consulting Psychology Journal: Practice and Research, 55(3), 139–154. https://doi.org/10.1037/1061-4087.55.3.139

Thiébaut, E. (2000). Les Bonnardel: les tests de raisonnement [B53 et BLS4]. Paris, FR: Editions et Applications Psychologiques.

van de Vijver, F. J., & Tanzer, N. K. (2004). Bias and equivalence in cross-cultural assessment: An overview. European Review of Applied Psychology, 54(2), 119-135. http://dx.doi.org/10.1016/j.erap.2003.12.004

Wechsler, D. (1997). Wechsler Adult Intelligence Scale (3rd ed.). San Antonio, TX: Psychological Corporation.

Young, F. W., Takane, Y., & Lewyckyj, R. (1978). ALSCAL: A nonmetric multidimensional scaling program with several individual-differences options. Behavior Research Methods & Instrumentation, 10(3), 451–453. https://doi.org/10.3758/BF03205177

Evaluating the Reliability and Validity of the TRI52: A Computerized Nonverbal Intelligence Test

Abstract

The TRI52 is a computerized nonverbal intelligence test composed of 52 figurative items designed to measure cognitive abilities without relying on acquired knowledge. This study aims to investigate the reliability, validity, and applicability of TRI52 in diverse populations. The TRI52 demonstrates high reliability, as indicated by a Cronbach's Alpha coefficient of .92 (N = 1,019). Furthermore, the TRI52 Reasoning Index (RIX) exhibits strong correlations with established measures, such as the Scholastic Aptitude Test (SAT) composite score, SAT Mathematical Reasoning test scaled score, Wechsler Adult Intelligence Scale III (WAIS-III) Full-Scale IQ, and the Slosson Intelligence Test - Revised (SIT-R3) Total Standard Score. The nonverbal nature of the TRI52 minimizes cultural biases, making it suitable for diverse populations. The results support the potential of TRI52 as a reliable and valid measure of nonverbal intelligence.

Keywords: TRI52, nonverbal intelligence test, psychometrics, reliability, validity, cultural bias

Introduction

Intelligence tests are essential tools in the field of psychometrics, as they measure an individual's cognitive abilities and potential. However, many intelligence tests have been criticized for cultural bias, which can lead to inaccurate results for individuals from diverse backgrounds (Helms, 2006). The TRI52 is a computerized nonverbal intelligence test designed to address this issue by utilizing 52 figurative items that do not require acquired knowledge. This study aims to evaluate the reliability, validity, and applicability of TRI52 in diverse populations.

Method

Participants

A total of 1,019 individuals participated in the study. The sample consisted of a diverse range of ages, ethnicities, and educational backgrounds, representing various cultural groups.

Procedure

The TRI52 was administered to participants in a controlled setting. Participants were given a set amount of time to complete the test. Before or after completing the TRI52, groups of participants also completed the Scholastic Aptitude Test (SAT), the Wechsler Adult Intelligence Scale III (WAIS-III), and the Slosson Intelligence Test - Revised (SIT-R3) to evaluate the convergent validity of the TRI52.

Measures

The TRI52 is a computerized nonverbal intelligence test consisting of 52 figurative items. The test yields a raw score and a Reasoning Index (RIX), which is an age-referenced standard score equated to the SAT Mathematical Reasoning test scaled score (College Board, 2010).

Results

The TRI52 demonstrated high reliability, with a Cronbach's Alpha coefficient of .92 (N = 1,019). The TRI52 raw score exhibited strong correlations with the SAT Composite Score (r = .74, N = 115), the SAT Mathematical Reasoning subtest scaled score (r = .86, N = 92), the WAIS-III Performance IQ (r =  .73, N = 24), and the SIT-R3 Total Standard Score (r = .71, N = 30).

Discussion

These findings indicate that the TRI52 is a reliable and valid measure of nonverbal intelligence. The high-reliability coefficient suggests that the TRI52 consistently measures cognitive abilities across various populations. The strong correlations with established measures further support its validity. The nonverbal nature of the TRI52 minimizes cultural biases, making it suitable for assessing individuals from diverse backgrounds.

Limitations and Future Research

Although the TRI52 demonstrated high reliability and strong convergent validity, the study has several limitations. First, the WAIS-III sample size was relatively small, potentially limiting the generalizability of the findings. Additionally, the study did not assess divergent validity or the test's predictive validity. Future research should address these limitations and explore the TRI52's performance in some larger, more diverse samples. Furthermore, researchers should investigate the test's divergent validity by comparing its scores with those of unrelated constructs, such as personality traits, to ensure that the TRI52 specifically measures nonverbal intelligence. Assessing the predictive validity of the TRI52 is also crucial to determine its ability to predict future outcomes, such as academic or occupational success. Longitudinal studies are recommended to explore this aspect of validity.

Conclusion

The TRI52 is a promising nonverbal intelligence test that demonstrates high reliability and strong convergent validity. Its nonverbal nature minimizes cultural biases, making it suitable for assessing individuals from diverse backgrounds. However, further research is needed to address limitations and explore the test's divergent and predictive validity. If supported by future research, the TRI52 could become a valuable tool in the field of psychometrics for measuring nonverbal intelligence across various populations.

References

College Board. (2010). The SAT® test: Overview. Retrieved from https://collegereadiness.collegeboard.org/sat

Helms, J. E. (2006). Fairness is not validity or cultural bias in racial/ethnic test interpretation: But are they separate or sequential constructs? American Psychologist, 61(2), 106-114.

Slosson, R. L., Nicholson, C. L., & Hibpshman, S. L. (1991). Slosson Intelligence Test - Revised (SIT-R3). Slosson Educational Publications.

Wechsler, D. (1997). Wechsler Adult Intelligence Scale (3rd ed.). Psychological Corporation.

Assessing the Validity and Reliability of the Crystallized Cognitive Assessment Test (CCAT)

Abstract

The Cerebrals Cognitive Ability Test (CCAT) is a psychometric test battery comprising three subtests: Verbal Analogies (VA), Mathematical Problems (MP), and General Knowledge (GK). The CCAT is designed to assess general crystallized intelligence and scholastic ability in adolescents and adults. This study aimed to investigate the reliability, criterion-related validity, and norm establishment of the CCAT. The results indicated excellent reliability, strong correlations with established measures, and suitable age-referenced norms. The findings support the use of the CCAT as a valid and reliable measure of crystallized intelligence and scholastic ability.

Keywords: Cerebrals Cognitive Ability Test, CCAT, psychometrics, reliability, validity, norms

Introduction

Crystallized intelligence is a crucial aspect of cognitive functioning, encompassing acquired knowledge and skills that result from lifelong learning and experiences (Carroll, 1993; Cattell, 1971). The assessment of crystallized intelligence is vital for understanding an individual's cognitive abilities and predicting their performance in various academic and professional settings. The Cerebrals Cognitive Ability Test (CCAT) is a psychometric test battery designed to assess general crystallized intelligence and scholastic ability, divided into three distinct subtests: Verbal Analogies (VA), Mathematical Problems (MP), and General Knowledge (GK).

As a psychometric instrument, the CCAT should demonstrate high levels of reliability, validity, and well-established norms to be considered a trustworthy measure. The current study aimed to evaluate the CCAT's psychometric properties by examining its reliability, criterion-related validity, and the process of norm establishment. Furthermore, the study sought to establish the utility of the CCAT for predicting cognitive functioning in adolescents and adults.

Method

Participants and Procedure

A sample of 584 participants, aged 12-75 years, was recruited to evaluate the reliability and validity of the CCAT. The sample was diverse in terms of age, gender, and educational background. Participants were administered the CCAT alongside established measures, including the Reynolds Intellectual Assessment Scales (RIAS; Reynolds & Kamphaus, 2003), Scholastic Assessment Test - Recentered (SAT I; College Board, 2010), and the Wechsler Adult Intelligence Scale III (WAIS-III; Wechsler, 1997). The data collected were used to calculate reliability coefficients, correlations with other measures, and age-referenced norms.

Reliability Analysis

The reliability of the full CCAT and its subtests was assessed using the Spearman-Brown corrected Split-Half coefficient, a widely-accepted measure of internal consistency in psychometric tests (Cronbach, 1951). This analysis aimed to establish the CCAT's measurement error, stability, and interpretability.

Validity Analysis

Criterion-related validity was assessed by examining the correlations between the CCAT indexes and established measures, including the RIAS Verbal Index, SAT I, and WAIS-III Full-Scale IQ and Verbal IQ. High correlations would indicate the CCAT's validity as a measure of crystallized intelligence and scholastic ability.

Norm Establishment

Norms for the CCAT were established using a subsample of 160 participants. The CCAT scales were compared with the RIAS VIX and WAIS-III FSIQ and VIQ to develop age-referenced norms. The RIAS VIX changes over time were applied to adjust the CCAT indexes, ensuring up-to-date and relevant norms.

Results

Reliability

The full CCAT demonstrated excellent reliability, with a Spearman-Brown corrected Split-Half coefficient of .97. This result indicates low measurement error (2.77 for the full-scale index) and good measurement stability. The Verbal Ability scale, derived from the combination of VA and GK subtests, also displayed a high level of reliability, with a coefficient of .96, supporting its interpretation as an individual measure.

Validity

The criterion-related validity of the CCAT was confirmed through strong correlations with established measures. The full CCAT and Verbal Ability scale demonstrated high correlations with the RIAS Verbal Index (.89), indicating a strong relationship between these measures. Additionally, the CCAT was closely related to the SAT I (.87) and both the WAIS-III Full-Scale IQ (.92) and Verbal IQ (.89), further supporting the CCAT's validity as a measure of crystallized intelligence and scholastic ability.

Discussion

The findings of this study provide strong evidence for the reliability and validity of the CCAT as a psychometric tool for assessing general crystallized intelligence and scholastic ability. The high-reliability coefficients indicate that the CCAT yields consistent and stable results, while the strong correlations with established measures support its criterion-related validity.

Moreover, the established age-referenced norms allow for accurate interpretation of CCAT scores across various age groups, making it suitable for adolescents and adults up to 75 years old. The computerized version of the CCAT provides raw scores for each subtest, further facilitating the assessment process and interpretation of results.

Despite these strengths, it is important to acknowledge the limitations of the current study. The sample was limited in size and diversity, which may affect the generalizability of the findings. Future research should aim to replicate these results in larger and more diverse samples, as well as explore the predictive validity of the CCAT in real-world academic and professional settings.

Conclusion

The Cerebrals Cognitive Ability Test (CCAT) is a reliable and valid psychometric instrument for measuring general crystallized intelligence and scholastic ability in adolescents and adults. The study findings support the use of the CCAT in educational and psychological assessment contexts and contribute to the growing body of literature on psychometric test development and evaluation.

References

Carroll, J. B. (1993). Human cognitive abilities: A survey of factor-analytic studies. New York: Cambridge University Press. https://doi.org/10.1017/CBO9780511571312

Cattell, R. B. (1971). Abilities: Their structure, growth, and action. Houghton Mifflin.

College Board (2010). Scholastic Assessement Test. Retrieved from https://www.collegeboard.org/

Cronbach, L. J. (1951). Coefficient alpha and the internal structure of tests. Psychometrika, 16(3), 297-334. https://doi.org/10.1007/BF02310555

Reynolds, C. R., & Kamphaus, R. W. (2003). Reynolds Intellectual Assessment Scales (RIAS) and the Reynolds Intellectual Screening Test (RIST), Professional Manual. Lutz, FL: Psychological Assessment Resources.

Wechsler, D. (1997). Wechsler Adult Intelligence Scale - Third Edition. San Antonio, TX: Psychological Corporation.