Psychological Measurement and Testing
Research articles on psychological measurement and testing.
- How to Interpret IQ Test Results
An IQ test report — obtained for oneself, a child, or a client — presents what should be a clean answer as a thicket of numbers, percentiles, confidence intervals, index…
- Autism and IQ: Intelligence in ASD
What does research say about IQ in autism? Learn about cognitive profiles in ASD, why traditional IQ tests may be misleading, and how intelligence varies across the...
- ADHD and Intelligence: The IQ-Attention Link
Does ADHD affect IQ scores? Explore what research reveals about the relationship between ADHD, attention, and measured intelligence — including why IQ tests may...
- How to Test Your Child’s IQ
Parents typically pursue IQ testing for a child with a specific question in mind: gifted-program eligibility, a school placement decision, an unexplained learning issue,...
- Do IQ Tests Measure What They Claim?
IQ tests are among the most scrutinized instruments in all of psychology. Critics argue they are culturally biased, too narrow to capture real intelligence, and used to...
- WAIS-IV vs WAIS-V: What Changed and Why It Matters
The WAIS-V (2024) is the first Wechsler revision since 2008. What changed in its structure, subtests, and scores — and what it means for interpreting an IQ.
- Online IQ Tests vs Professional Assessments: How Accurate?
Can a free 10-minute online IQ test match a professional assessment? What online tests can and cannot tell you, and how their accuracy really compares.
- Psychometrics: The Science of Psychological Measurement
Psychometrics, a specialized branch within psychology, is dedicated to the theory and methodology of psychological measurement. This discipline encompasses the...
- Tellegen-Briggs Formula 4 for Composite Scores
A psychologist administering a partial Wechsler battery — say, four core subtests rather than the full ten — needs a way to convert the resulting subtest scores into a...
- History of the WAIS: Wechsler-Bellevue to WAIS-V
The Wechsler Adult Intelligence Scale is the most widely administered individual IQ test in clinical practice, and has been for most of the 70 years since David Wechsler...
- Overclaiming: Why People Claim Knowledge They Don’t Have
Asked to rate their familiarity with topics, a substantial proportion of survey respondents claim they understand concepts that don’t exist. Paulhus and Harms (2004), in...
- JCTI Validity and Reliability: The Evidence
How reliable and valid is the Jouve-Cerebrals Test of Induction (JCTI)? Its concurrent-validity correlations with SAT and RIST, and its reliability estimates.
- JCCES: Reliability of the Crystallized Skills Scale
The Jouve-Cerebrals Crystallized Educational Scale (JCCES) is a three-subtest cognitive battery — verbal analogies, mathematical problems, and general knowledge — built...
- JCFS: Assessing Nonverbal Intelligence
Most cognitive ability tests in widespread use are either verbal-heavy (vocabulary, comprehension, knowledge) or rely on a fixed sequence of items that takes everyone a...
- JCWS: A Verbal Abilities Test
The Jouve-Cerebrals Word Similarities (JCWS) is a 150-item open-response verbal-reasoning test built around a distinctive item format that combines partial-letter cues...
- IAW: Assessing Verbal Intelligence
The I Am a Word (IAW) test is a 100-item open-ended vocabulary measure (plus 50 experimental items) developed by Xavier Jouve in 2011 and revised through 2025.
- NIH Toolbox: Cognitive Change in Intellectual Disability
The National Institutes of Health Toolbox Cognition Battery (NIHTB-CB) is a brief, iPad-based battery of cognitive tests that has become one of the most widely-used...
- Validity of WISC-V Strengths and Weaknesses Profiles
When a child’s WISC-V shows uneven index scores — say, a Verbal Comprehension Index of 115 and a Working Memory Index of 95 — clinicians, parents, and schools often...
- Continuous Norming for Cognitive Tests
The standard practice in psychometric test publication is to develop norm tables by stratifying the standardization sample into age bands and computing percentile-rank...
- NCS-6: A Brief Need for Cognition Scale
The Need for Cognition Scale was conceived as a measure of the dispositional tendency to engage in—and enjoy—effortful cognitive activity (Cacioppo & Petty, 1982).
- Nonmemory-Based Performance Validity Tests
Performance validity tests (PVTs) are the neuropsychologist’s safeguard against test results that look like cognitive impairment but actually reflect insufficient...
- WISC-V Short-Form IQ Estimation
Administering the full Wechsler Intelligence Scale for Children, Fifth Edition (WISC-V) takes 60 to 80 minutes for the seven subtests that compose Full Scale IQ.
- WAIS-IV CHC Factor Structure in Older Adults
The published four-factor structure of the Wechsler Adult Intelligence Scale—Fourth Edition (Verbal Comprehension, Perceptual Reasoning, Working Memory, Processing...
- Stanford-Binet vs WAIS in Intellectual Disability
Two of the most widely used adult intelligence tests — the Stanford-Binet Intelligence Scales (SB5) and the Wechsler Adult Intelligence Scale (WAIS) — produce notably...
- What the WAIS-IV Measures: Subtests Explained
The question in the title was first posed in print by Benson, Hulac, and Kranzler (2010), who ran the earliest independent factor analysis of the Wechsler Adult...
- JCCES Crystallized Index and Cognitive and Academic Measures
The construct validity of a cognitive test rests on the pattern of its correlations with other measures of the same and related constructs. A test that claims to measure...
- Age-Based Reliability of the JCTI
The reliability of a cognitive test is the consistency with which it measures whatever it measures — the precision of the scores it returns, expressed as the proportion...