A recent study by Denisova and Wolpert (2024) investigates how early sensorimotor features relate to cognitive differences in toddlers diagnosed with autism spectrum disorder (ASD). By examining over 1,000 children with varying IQ levels, the researchers reveal how sensorimotor variability impacts behaviors linked to autism, providing valuable insights for individualized …
Understanding how genetic and environmental influences shape cognitive abilities remains a cornerstone of psychological research. Jiang et al. (2024) present an important study that examines these influences through a structured twin-based model. This research provides insight into how basic and higher-order cognitive functions are differentially affected by genetic inheritance and …
Recent research by Jiang et al. (2024) sheds light on the distinct genetic and environmental influences shaping hierarchical cognitive abilities in adults. By categorizing cognitive functions into two levels—basic processes and higher-order functions—this study provides valuable insights into how these abilities develop and differ in their origins. Background Human cognition …
Research into high intelligence provides valuable insights into human cognitive abilities and their impact on individual and societal progress. By exploring the historical development of intelligence studies, the challenges of measuring exceptional cognitive abilities, and recent advancements in neuroscience and psychometrics, this article highlights the ongoing importance of understanding high-IQ …
The Wechsler Adult Intelligence Scale (WAIS), developed in 1955 by David Wechsler, introduced a broader and more dynamic approach to assessing cognitive abilities. Over the years, it has been refined through several editions, becoming one of the most widely used tools in psychological and neurocognitive evaluations. This post reviews its …
The Jouve-Cerebrals Crystallized Educational Scale (JCCES) has been thoroughly evaluated for its reliability and consistency. This large-scale study, involving 1,079 examinees, utilized both Classical Test Theory (CTT) and Item Response Theory (IRT) methods to analyze the scale’s performance and internal structure. Background The JCCES was developed to measure crystallized cognitive …
The Jouve-Cerebrals Figurative Sequences (JCFS) is a self-administered test designed to measure nonverbal cognitive abilities, focusing on pattern recognition and problem-solving. This post outlines the psychometric evaluation of the JCFS, emphasizing its reliability and practical applications while acknowledging areas for future development. Background The JCFS was developed to provide a …
The Flynn effect, which refers to the steady rise in intelligence test scores observed over decades, has been a subject of significant interest in psychological research. While this phenomenon has been extensively documented in European populations, fewer studies have explored its presence or reversal in the United States, especially among …
The study by Paul et al. (2022), published in Brain, investigates the effects of the CORD7 mutation on synaptic transmission and its connection to cognitive abilities. This mutation, linked to increased verbal IQ and enhanced working memory, alters the RIMS1/RIM1 protein at presynaptic active zones. The research offers new insights …
This study, authored by Jaekel et al. (2019), examines the relationship between being born very preterm (VP) or with very low birth weight (VLBW), cognitive abilities, and wealth accumulation in adulthood. By tracking participants from birth to 26 years of age, the research provides key insights into how early cognitive …
