PubMed Health⌕ Search
Home/Archive/PubMed

PubMed · 3884639

X chromosome abnormalities and cognitive development: implications for understanding normal human development.

S Walzer
View original source ↗Export metadata ↓

Abstract

Recent advances in the biological sciences have offered new opportunities to identify biological contributions as they interact with social experience to help determine psychological development. The role of biological factors is more easily demonstrated in subhuman species in which extensive experimental manipulations of variables are possible. One strategy for the study of human behaviour genetics has been the systematic analysis of behaviour in individuals with naturally occurring X chromosome variations. The aim has been to demonstrate whether or not the range of expected variability in particular areas of behavioural development was narrowed by the specific genotypic abnormality. The knowledge obtained from these studies can be applied meaningfully to enhance our understanding about human behavioural development in chromosomally unaffected individuals.

Explore related subjects

Auditory PerceptionCell DivisionChildCognitionFemaleFragile X SyndromeFunctional LateralityGonadal Steroid HormonesHumansIntellectual DisabilityKlinefelter SyndromeLanguage DisordersLearning DisabilitiesMaleMathematicsReadingSex Chromosome AberrationsSpace PerceptionTurner SyndromeX ChromosomeJournal ArticleReview

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

S Walzer. 1985. X chromosome abnormalities and cognitive development: implications for understanding normal human development.. https://doi.org/10.1111/j.1469-7610.1985.tb02258.x

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related citations

PubMed1995

Processing of speech signals for physical and sensory disabilities.

Assistive technology involving voice communication is used primarily by people who are deaf, hard of hearing, or who have speech and/or language disabilities. It is also used to a lesser extent by people with visual or motor disabilities. A very wide range of devices has been developed for people with hearing loss. These devices can be categorized not only by the modality of stimulation [i.e., auditory, visual, tactile, or direct electrical stimulation of the auditory nerve (auditory-neural)] but also in terms of the degree of speech processing that is used. At least four such categories can be distinguished: assistive devices (a) that are not designed specifically for speech, (b) that take the average characteristics of speech into account, (c) that process articulatory or phonetic characteristics of speech, and (d) that embody some degree of automatic speech recognition. Assistive devices for people with speech and/or language disabilities typically involve some form of speech synthesis or symbol generation for severe forms of language disability. Speech synthesis is also used in text-to-speech systems for sightless persons. Other applications of assistive technology involving voice communication include voice control of wheelchairs and other devices for people with mobility disabilities.

Auditory Perception↗
PubMed1995

Classification of color dimensions in multiple contexts.

Hue, saturation, and brightness were tested in pairs, with one dimension creating a classification context and the other serving as the basis of a set of speeded classification tasks. In Experiment 1, performance suffered when the context-setting dimension varied within a response category (intraclass context) and benefited when this variation occurred between response categories (redundant context). In Experiment 2, participants showed no interference from irrelevant variation in tasks that combined intraclass context with redundant context. Experiment 3 opened the interpretative window by varying 5 levels of intraclass context factorially with 5 levels of redundant context. The dimensions were found to differ in hardness--the degree of resistance to intraclass context across levels--with hue showing the greatest resistance and brightness the least. Hardness may reflect the efficacy of a dimension for distinguishing real-world categories.

Auditory Perception↗