Two persons with severe intellectual disabilities and two persons with profound intellectual disabilities were repeatedly presented with five different pairs of food items. The five pairs of items represented different degrees of preference, from highest to lowest. Happiness indices were monitored from the time that a pair of items was presented…

The history of the writing of "Verbal Behavior" (Skinner, 1957), Chomsky's review (1959), and MacCorquodale's rebuttal (1970) are briefly summarized. Chomsky's recent reflections on his review are analyzed: Chomsky's refusal to acknowledge the review's errors or its aggressive tone is consistent with his polemical style but comes at a minor cost…

Previous studies have shown that after being trained on A-B and A-C match-to-sample tasks, adults match not only same-class B and C stimuli (equivalence) but also BC compounds with same-class elements and with different-class elements (BC-BC). The assumption was that the BC-BC performances are based on matching equivalence and nonequivalence…

This experiment examined the effects of reinforcement probability on resistance to change of remembering and response rate. Pigeons responded on a two- component multiple schedule in which completion of a variable-interval 20-s schedule produced delayed matching-to-sample trials in both components. Each session included four delays (0.1 s, 2 s, 4…

Two experiments explored the behavior of 20 Asian elephants ("Elephas aximus") in simultaneous visual discrimination tasks. In Experiment 1, 7 Burmese logging elephants acquired a white+/black- discrimination, reaching criterion in a mean of 2.6 sessions and 117 discrete trials, whereas 4 elephants acquired a black+/white- discrimination in 5.3…

It has long been known that acute marijuana administration impairs working memory (e.g., the discrimination of stimuli separated by a delay). The determination of which of the individual components of memory are altered by marijuana is an unresolved problem. Previous human studies did not use test protocols that allowed for the determination of…

Stepping Stones to Literacy (SSL) is a supplemental curriculum designed to promote listening, print conventions, phonological awareness, phonemic awareness, and serial processing/rapid naming (quickly naming familiar visual symbols and stimuli such as letters or colors). The program targets kindergarten and older preschool students considered to…

According to the spatial registration hypothesis, the representation of stimulus location is automatically encoded during perception and it can interact with a more abstract linguistic representation. We tested this hypothesis in two experiments, using the semantic judgements of words. In the first experiment, words for animals that either fly or…

Do native readers segment polysyllabic words based on orthographic/morphological criteria or phonological criteria? Research by Taft (1979, 2001) argues in support of the former, as readers were faster in split-word lexical decision tasks when the words were segmented by orthographic/ morphological principles based on Basic Orthographic Syllable…

Few studies have examined the ability of individuals with learning disabilities, in general, or with Down syndrome, specifically, to discriminate speech. The purpose of this study was compare the speech discrimination abilities of eight children with Down syndrome (aged 5.7 to 12.8 years) to seven nonverbal mental-age matched controls (aged 4.0 to…

One of the ways to improve the reliability in perceptual voice quality rating is to provide listeners with external anchors. A paired comparison matching paradigm using synthesized Cantonese voice stimuli that covered a range of rough and breathy qualities were used to investigate the rating reliability. Twenty-five speech pathology students rated…

The purposes of this study are to test whether the processing of subject relative (SR) clauses is easier than that of object relative (OR) clauses in Turkish and to investigate whether the comprehension of SRs can be better explained by the linear distance hypothesis or structural distance hypothesis (SDH). The question is examined in two groups…

Face recognition impairments are well documented in older children with Autism Spectrum Disorders (ASD); however, the developmental course of the deficit is not clear. This study investigates the progressive specialization of face recognition skills in children with and without ASD. Experiment 1 examines human and monkey face recognition in…

Historically, sensory systems have been largely ignored as potential loci of information storage in the neurobiology of learning and memory. They continued to be relegated to the role of "sensory analyzers" despite consistent findings of associatively induced enhancement of responses in primary sensory cortices to behaviorally important signal…

Over the past decade, listening comprehension tests have been converting to computer-based tests that include visual input. However, little research is available to suggest how test takers engage with different types of visuals on such tests. The present study compared a series of still images to video in academic computer-based tests to determine…