Response allocation to concurrent fixed-ratio reinforcement schedules with work requirements by adults with mental retardation and typical preschool children.

The present experiments examined the effect of work requirements in combination with reinforcement schedule on the choice behavior of adults with mental retardation and preschool children. The work requirements of age-appropriate tasks (i.e., sorting silverware, jumping hurdles, tossing beanbags) were manipulated. Participants were presented with their choice of two response options for each trial that varied simultaneously on both work requirement and reinforcement schedule. Results showed that when responding to both choices occurred on the same reinforcement schedule, participants allocated most of their responses to the option with the easier work requirement. When the response option requiring less work was on a leaner reinforcement schedule, most participants shifted their choice to exert more work. There were individual differences across participants regarding their pattern of responding and when they switched from the lesser to the greater work requirement. Data showed that participants' responding was largely controlled by the reinforcement received for responding to each level of work. Various conceptualizations regarding the effects of work requirements on choice behavior are discussed.     

求偶动机对男性冒险行为倾向的影响

基于风险行为的性选择理论, 通过内隐启动的方法探讨了求偶线索与奖赏线索对两性风险行为报告的影响。研究结果显示, 男性接触求偶线索, 与接触奖赏线索相比, 更有可能进行娱乐领域、健康领域与社会领域的风险行为活动; 而女性接触奖赏线索后, 与求偶线索相比, 更有可能会从事社会领域的风险行为活动; 两性接触求偶线索与奖赏线索后都较少可能从事经济领域的风险行为活动。这些结果符合性选择理论, 说明与求偶有关的信息线索能够诱导男性进行高风险活动, 因为在进化过程中冒险行为可以作为好基因的标志增加男性获得配偶的机会。这些结果还揭示了, 求偶动机对男性冒险行为的诱发作用远胜于外部动机(如金钱奖赏), 因为求偶是人类在长期进化过程中形成的本能需求。     

Stereotype threat may not impact women's inhibitory control or mathematical performance: Providing support for the null hypothesis

Underpinned by the findings of Jamieson and Harkins (2007; Experiment 3), the current study pits the mere effort motivational account of stereotype threat against a working memory interference account. In Experiment 1, females were primed with a negative self- or group stereotype pertaining to their visuospatial ability and completed an anti-saccade eye-tracking task. In Experiment 2 they were primed with a negative or positive group stereotype and completed an anti-saccade and mental arithmetic task. Findings indicate that stereotype threat did not significantly impair women's inhibitory control (Experiments 1 and 2) or mathematical performance (Experiment 2), with Bayesian analyses providing support for the null hypothesis. These findings are discussed in relation to potential moderating factors of stereotype threat, such as task difficulty and stereotype endorsement, as well as the possibility that effect sizes reported in the stereotype threat literature are inflated due to publication bias.     

Aversive functions of response effort: Fact or artifact?

Historically, effort has been viewed as aversive. Most supporting evidence comes from studies demonstrating increased force/effort requirements reduce operant responding. Changes in force/effort requirements, however, are often accompanied by changes in response definition when mechanical devices are used to define the response. As a consequence, responses measured at one point in a study may go unmeasured at other points. In an alternative approach, we used a continuous measurement strategy that provided a means to fix the threshold force defining the response class and simultaneously allowed independent manipulation of the force criteria required to produce reinforcement. Rats pressed a force transducer according to a fixed‐ratio 5 schedule of food delivery. The criterion force was systematically increased and decreased; the threshold for response detection was constant. When response rates included only criterion responses, overall rate decreased when force requirements increased. By contrast, when all responses, both those meeting force criteria and those that did not (above the threshold but below the criteria for reinforcement) were included in the rate calculation, increases in force increased response rate. Increases in force criteria also increased the maximum force (g) and time‐integral of force (g‐s) of operant behavior. Control conditions showed increases in responding could be explained by the emergence of subcriterion responses, irrespective of force. We conclude that prior results showing effort decreases response rates are due to an artifact arising from inadvertent changes in response definitions. Increases in effort may better be understood as changes in the response:reinforcer payoff owing to the emergence of a subcriterion response class.     

Agent causation as a solution to the problem of action

My primary aim is to defend a nonreductive solution to the problem of action. I argue that when you are performing an overt bodily action, you are playing an irreducible causal role in bringing about, sustaining, and controlling the movements of your body, a causal role best understood as an instance of agent causation. Thus, the solution that I defend employs a notion of agent causation, though emphatically not in defence of an account of free will, as most theories of agent causation are. Rather, I argue that the notion of agent causation introduced here best explains how it is that you are making your body move during an action, thereby providing a satisfactory solution to the problem of action.     

Stuck like glue: the formation and consequences of brand attachments among salespeople

Although managers and researchers put utmost importance on uncovering factors that affect effort and performance of sales representatives, they have largely overlooked a key factor. This research aims to remedy this neglect by shedding light on salesperson brand attachment. A qualitative study first examines the prevalence of attachment and uncovers several potential antecedents. Two follow-up empirical studies show that identification and psychological ownership are significant predictors of salesperson brand attachment. Informed by this research, managers can encourage brand attachment, with the end goal of increasing salesperson effort and ultimately performance, by increasing feelings of identification and psychological ownership among salespeople. This impact is particularly notable among brands with low market share, which are often a key concern of managers. The findings provide novel insights into how attachment affects sales representatives, as well as potential methods to cultivate such an attachment.     

Evaluating Effort: Influences of Evaluation Mode on Judgments of Task‐specific Efforts

The claim that humans adapt their actions in ways that avoid effortful processing (whether cognitive or physical) is a staple of various theories of human behavior. Although much work has been carried out focusing on the determinants of such behaviors, less attention has been given to how individuals evaluate effort. In the current set of experiments, we utilized the general evaluability theory to examine the evaluability of effort by examining subjective value functions across different evaluation modes. Individuals judged the anticipated effort of four task‐specific efforts indexed by stimulus rotation, items to be remembered, weight to be lifted, and stimulus degradation across joint (i.e., judged comparatively) and single evaluation modes (i.e., judged in isolation). General evaluability theory hypothesizes that highly evaluable attributes should be consistently evaluated (i.e., demonstrate similar subjective value functions) between the two modes. Across six experiments, we demonstrate that the perceived effort associated with items to be remembered, weight to be lifted, and stimulus degradation can be considered relatively evaluable, while the effort associated with stimulus rotation may be relatively inevaluable. Results are discussed within the context of subjective evaluation, internal reference information, and strategy selection. In addition, methodological implications of evaluation modes are considered. Copyright © 2017 John Wiley & Sons, Ltd.     

Introducing a forced-choice recognition task to the California Verbal Learning Test – Children’s Version

The importance of performance validity tests (PVTs) is increasingly recognized in pediatric neuropsychology. To date, research has focused on investigating whether PVTs designed for adults function similarly in children. The downward extension of adult cutoffs is counter-intuitive considering the robust effect of age-related changes in basic cognitive skills in children and adolescents. The purpose of this study was to examine the signal detection properties of a forced-choice recognition trial (FCR-C) for the California Verbal Learning Test – Children’s Version. A total of 72 children aged 6–15 years (M = 11.1 , SD = 2.6) completed the FCR-C as part of a larger neuropsychological assessment battery. Cross-validation analyses revealed that the FCR-C had good signal detection performance against reference PVTs. The first level of failure (≤14/15) produced the best combination of overall sensitivity (.31) and specificity (.87). A more conservative FCR-C cutoff (≤13) resulted in a predictable trade-off between sensitivity (.15) and specificity (.94), but also a net loss in discriminant power. Lowering the cutoff to ≤12 resulted in a slight improvement in specificity (.97) but further deterioration in sensitivity (.14). These preliminary findings suggest that the FCR-C has the potential to become the newest addition to a growing arsenal of pediatric PVTs.     

The reversed work‐ethic effect: Monkeys avoid stimuli associated with high‐effort1

We investigated how different numbers of responses prior to the presentation of a stimulus influenced preferences for the stimulus in three Japanese monkeys (Macaca fuscata). Monkeys were trained for two kinds of simultaneous discriminations that followed a high‐effort or a low‐effort response. In probe test trials, the stimulus that followed the high‐effort and the stimulus that followed the low‐effort response during discriminations were presented simultaneously. All monkeys chose stimuli that in training followed a low‐effort response. This result suggested that monkeys avoided stimuli that followed high‐effort responses because of the association between those stimuli and the preceding greater effort. The present result is consistent with our previous study conducted with humans, but contradicts analogous studies carried out with pigeons that reported either opposite results (i.e. pigeons preferred the stimuli after high‐effort) or non‐biased preferences. The differences between mammals and birds are discussed in terms of the lack of a successive negative contrast effect in birds.