TEACHING CHOICE MAKING DURING SOCIAL INTERACTIONS TO STUDENTS WITH PROFOUND MULTIPLE DISABILITIES

We taught 4 students with profound multiple disabilities to use a microswitch communication system to request a change in recreational stimuli during social interactions with nondisabled peers. In Study 1, we conducted a preference assessment across a range of stimuli for each student. The most and least preferred stimuli were incorporated into microswitch communication system training in Study 2. During the second study, 3 of the 4 students (a) learned to use the microswitch communication system to control stimulus presentation, (b) more clearly differentiated their time among stimuli, and (c) increased their level of general alertness. Study 3 extended the use of the microswitch communication system to social interactions with nondisabled peers. Two students were more engaged in interactions when they chose when to change stimuli; 1 student was more alert when a peer chose when to change activities; a 4th student showed an undifferentiated pattern. The outcomes of the investigation are discussed in terms of the effects of controlling stimulus presentation on the behavior of students with profound multiple disabilities and the stability of preference hierarchies over time.     

Color preference in pigeons: stimulus intensity and reinforcement contingency effects in the avoidance of blue stimuli.

In a procedure intended to determine color preference in pigeons (which partially replicated Catania, Owens, & von Lossberg, 1983), two keys were illuminated by different colors drawn from a set of amber, red, green, or blue stimuli; this was followed by the presentation of grain when either of the two colors was pecked. The grain was illuminated alternately across trials with the colors presented on the keys. In Experiment 1 the intensity of the color stimuli used was not equalized, whereas in Experiment 2 the intensity of the colors was equalized. The low preference for blue found in Experiment 1, as measured by differential key pecking, was not found in Experiment 2. The discriminability of the intensity-equalized colors was confirmed in Experiment 2a, in which equal-intensity color discrimination problems were presented. In Experiment 3, as in Catania et al. (1983), a response-independent reinforcement schedule was used, but with intensity-equalized colors. In contrast to Experiment 2, very low preference for blue was found here and in Experiment 4, which used a within-subject procedure. These findings suggest that pigeon color preference may be a function of intensity, but all controlling variables have not as yet been identified.     

Music fan personality stereotyping in a sample of South African young adults

This study aimed to elicit stereotypes about personality characteristics of young adults residing in South Africa, based solely on music genres. Participants were 941 undergraduate students at a South African university. They responded to a number of surveys about music genre preferences and personality traits. Data were analysed for trends and patterns in personality attributions based on music genre preferences. The results indicated that participants hold distinct stereotypes about the personality traits, so that those with who preferred Classical, Blues and Jazz music were seen to display higher openness to experience than comparison groups with other music genre preferences. Those with Rap, Reggae and Folk music genre preferences were stereotyped as artistic and unconventional. Young South African adults appear to use musical preference to define personality.     

The effects of preference assessment type on problem behavior

Individuals with intellectual and developmental disabilities who engage in problem behavior maintained by access to tangibles may exhibit more problem behavior during certain preference assessments. We compared three common preference assessments to determine which resulted in fewer problem behaviors. The paired stimulus and multiple‐stimulus without replacement assessments produced higher rates of problem behavior than the free operant (FO) assessment, suggesting that the FO assessment may be the most appropriate assessment for individuals who engage in problem behavior maintained by access to tangibles.     

Understanding action control of resistance training among adults

BackgroundRegular muscle and bone strengthening activities through resistance training (RT) have been associated with numerous health benefits, particularly as adults age, yet participation is low. Effective promotion is likely founded on an understanding of theory-based correlates, yet almost all RT research has focused on college-aged convenience samples and employed social cognition models, which do not consider the intention-behavior gap. The purpose of this study was to explore RT from the perspective of the multi-process action control (M-PAC) framework in a large Canadian adult sample.MethodCanadian adults (N = 1338) completed M-PAC measures of reflective (instrumental attitude, affective attitude, perceived capability and opportunity), regulatory (planning and self-monitoring), and reflexive (habit, identity) processes as well as intention to engage in RT at baseline and RT behavior two-weeks later.ResultsThree intention-behavior profiles emerged: a) non-intenders who were not active (41.4%), b) unsuccessful intenders who failed to enact their positive intentions (32.9%), and c) successful intenders who engaged in RT (23.5%). A discriminant function analysis (p < .01) showed that instrumental and affective attitude, perceived opportunity and planning/self-monitoring distinguished between all three intention-behavior profiles, while perceived capability predicted the intention-RT profiles of females but not males (p < .01). By comparison, identity was particularly important to younger/middle-aged adults than older females (p < .01), while habit was associated with the intention-RT profiles of older adults but not younger/middle-aged adults (p < .01).ConclusionsThe findings support the importance of considering both intention formation and translation in RT. Behavior change techniques aimed at reflective, regulatory, and reflexive processes appear necessary. Additional considerations of targeting specific constructs by age and sex may maximize the potential effectiveness of RT interventions.     

Subadditive versus hyperbolic discounting: A comparison of choice and matching

Impulsive and myopic choices are often explained as due to hyperbolic discounting, meaning that people are impatient for outcomes available immediately, and become increasingly more patient the more the outcome is delayed. Recent research, however, has suggested that much experimental evidence for increasing patience is actually due to subadditive discounting: people are less patient (per-time-unit) over shorter intervals regardless of when they occur. Because previous research into subadditive discounting has used a choice elicitation procedure, the present paper tests whether it generalises to matching. We find strong evidence that it does, but also find weak evidence of increasing patience for matching. We suggest, however, that subadditive discounting alone may be sufficient to account for all of our results. We conclude by questioning the contribution that hyperbolic discounting makes to our understanding of time preference.     

信息载体对初一学生认知负荷与态度偏好的影响

使用认知负荷量表和态度偏好问卷,以相同文章为材料,探究初一学生基于不同信息载体(纸质、电脑、电子阅读器)的认知负荷和态度偏好的差异。结果显示:(1)纸质阅读组的认知负荷大于电脑组和电子阅读器组;(2)电脑组和电子阅读器组的认知负荷和态度偏好均不存在显著差异;(3)被试基于特定载体的认知负荷和态度偏好呈现显著的负相关。所有结果均表明:初一年级的学生更加喜欢进行电子阅读。因此,在现实教学中不必只使用纸质材料,还可适当使用电子阅读。     

Personal Identity and the Importance of One's Own Body: A Response to Derek Parfit

In this essay I take issue with Derek Parfit's reductionist account of personal identity.Parfit is concerned to respond to what he sees as flaws in the conception of the role of 'person' in self-interest theories. He attempts to show that the notion of a person as something over and above a totality of mental and physical states and events (in his words, a 'further fact'), is empty, and so, our ethical concerns must be based on something other than this. My objections centre around the claim that Parfit employs an impoverished conception of 'life'. Parfit misconceives the connection between 'I' and one's body, and, so, despite his rejection of a metaphysical conception of 'self', remains within the logic of Cartesianism. What Parfit and other reductionists call an 'impersonal' perspective, I shall call the third-person perspective: a perspective which one in general may take. Against Parfit I shall offer a more complex conception of 'self' through the concept of 'bodily perspective'. I emphasize the irreducible ambiguities of human embodiment in order to show the presuppositions and the limitations of Parfit's view. Of interest is the conception of time and the model of continuity that is appropriate to an embodied subject's life. I employ Paul Ricoeur's concept of 'human time' to argue that the reflective character of human experience demands a model of temporality and continuity that differs significantly from the one Parfit employs.     

Intelligence and Extraversion in the neural evaluation of delayed rewards

Temporal discounting (TD), the preference for earlier, smaller rewards over delayed, larger rewards, is a pervasive phenomenon that covaries with Big Five personality traits and Intelligence (IQ). This study provides novel insight by identifying correlates for IQ and Extraversion in the neural representation of TD preferences. An intertemporal choice task was employed, where offers were sequentially presented, distinguishing between one evaluation phase (first offer is presented) and one comparison phase (second offer is presented and values are compared). IQ correlated with responses of caudate nucleus to the subjective values of the offers, suggesting a role of cognitive abilities in modulating reward responses. Extraversion correlated with the strength of functional connectivity of a reward evaluation network centered on ventromedial prefrontal cortex.