Development of Lexical and Sentence Level Context Effects for Dominant and Subordinate Word Meanings of Homonyms

Nine-ten-and twelve-year-old children (N = 75) read aloud dominant, subordinate or ambiguous bias sentences (N = 120) that ended in a homonym (BALL). After the sentence (1,000 ms), children read aloud targets that were related to the dominant (BAT) or subordinate (DANCE) meaning of the homonym or control targets. Participants were also divided into three reading skill groups based on an independent measure of single word oral reading accuracy. There were three main developmental and reading skill findings. First, 9-year-olds and low skill readers showed lexical level facilitation in accuracy. Second, 9- and 10-year-olds or low and moderate skill readers showed lexical level facilitation in reaction time. Third, 12-year-olds or high skill readers showed sentence level facilitation in reaction time with high skill readers additionally showing sentence level inhibition in reaction time. These results show that lexical level context effects decreased and that sentence level context effects increased with development and skill. These results are discussed in terms of connectionist models of visual word recognition that incorporate distributed attractor principles.     

Brief functional analysis and treatment of tantrums associated with transitions in preschool children

A brief functional analysis was used to examine the influence of termination of prechange activities and initiation of postchange activitieson tantrums exhibited by 2 preschool children. For 1 participant, tantrums were maintained by access to certain (pretransition) activities. For a 2nd participant, tantrums were maintained by avoidance of certain task initiations. Although advance notice of an upcoming transition was ineffective, differential reinforcement of other behavior plus extinction reduced tantrums for both participants.     

Testosterone and dominance in men

In men, high levels of endogenous testosterone (T) seem to encourage behavior intended to dominate--to enhance one's status over--other people. Sometimes dominant behavior is aggressive, its apparent intent being to inflict harm on another person, but often dominance is expressed nonaggressively. Sometimes dominant behavior takes the form of antisocial behavior, including rebellion against authority and low breaking. Measurement of T at a single point in time, presumably indicative of a man's basal T level, predicts many of these dominant or antisocial behaviors. T not only affects behavior but also responds to it. The act of competing for dominant status affects male T levels in two ways. First, T rises in the face of a challenge, as if it were an anticipatory response to impending competition. Second, after the competition, T rises in winners and declines in losers. Thus, there is a reciprocity between T and dominance behavior, each affecting the other. We contrast a reciprocal model, in which T level is variable, acting as both a cause and effect of behavior, with a basal model, in which T level is assumed to be a persistent trait that influences behavior. An unusual data set on Air Force veterans, in which data were collected four times over a decade, enables us to compare the basal and reciprocal models as explanations for the relationship between T and divorce. We discuss sociological implications of these models.     

The User Interface in Computer-based Selection and Assessment: Applied and Theoretical Problematics of an Evolving Technology

Although its central role in human-computer interaction is recognized by industry, the user interface (UI) has received scant attention in the computer-based testing (CBT) literature. Industrial and European Community ergonomic directives have been established regarding UI design issues, however, which may significantly impact upon CBT. Accordingly, the UI’s CBT role is discussed regarding central CBT/UI constructs and dynamics. On the basis of one CBT UI design issue (here: paging) it is shown that many ergonomic regulatory definitional traps exist for the unwary CBT practitioner and UI designer. Newer UI developments in windowing technology and computer-based UI ergonomic regulation conformance analysis are described. Finally, open issues regarding CBT UI problematics are discussed, showing that, rather than continuing to lead a shadowed existence, the UI is deserving of considerably increased research effort regarding its CBT impact.     

Four effects of exogenous insulin on food intake

After a subcutaneous injection of bovine insulin into the rat, at first there is an augmentation of the satiety produced by nutrient eaten immediately before injection. Later, with large enough doses, as has been commonly observed, feeding is elicited—perhaps simply by hastening the passage of satiety. A third type of effect is behavioural disruption, reducing food and water intake when food is withheld for an hour after injection and producing postural changes even when food is present. Fourth, repeated pairing of insulin injection with intake of water of a particular flavour (even when drunk over half an hour beforehand) depresses subsequent intake of water having that flavour, whether presented alone or together with water of another flavour which has been paired with control injections. The acquired discriminated intake change involves the initial acceptability of the flavour but changes in the inhibition of acceptability during an intake bout have not been excluded.     

Behaviour therapy for obesity: The role of clinicians in the reduction of overweight

Behaviour therapists are often required to help those who are unhealthily overweight to reduce. Unfortunately, these interventions are often ineffective in the long-term. Many clients never achieve reduced weight. Often, those who do reduce weight are unsuccessful in keeping the weight off. A review of the relevant literature suggests that most therapeutic approaches do not enable people to change their lifestyles in the ways likely to be necessary for permanent reduction of weight to a healthy level. Clinical support for weight reduction would be more effective if it were more culturally realistic and therapeutically sensitive in empowering clients to make informed choices for themselves among sustainable habits of eating and exercise that contribute to negative energy balance. Approaches which encourage client self-efficacy and self-assertion are likely to be more effective in facilitating lasting change.