While autism is highly heritable, researchers suspect both environmental and genetic factors as causes. In rare cases, autism is strongly associated with agents that cause birth defects. Controversies surround other proposed environmental causes; for example, the vaccine hypotheses have been disproven.iagnosis is based on behavior, not cause or mechanism. Under the DSM-5, autism is characterized by persistent deficits in social communication and interaction across multiple contexts, as well as restricted, repetitive patterns of behavior, interests, or activities.
Wiktionary(0.00 / 0 votes)Rate this definition: downsampling(Noun) The process of reducing the sampling rate of a signal. Downsampling. In signal processing, downsampling is the process of reducing the sampling rate of a signal. This is usually done to reduce the data rate or the size of the data.
contraction. noun. 1. tightening, narrowing, tensing, shortening, drawing in, constricting, shrinkage Cramp is caused by contraction of the muscles. 2. abbreviation, reduction, shortening, compression, diminution, constriction, elision `It's' is a contraction of `it is'.