Live training versus e‐learning to teach implementation of listener response programs

Discrete‐trial teaching is an effective teaching procedure that must be implemented with high integrity to produce optimal learning. Behavioral Skills Training (BST) has proven effective for staff training; however, BST is time and labor intensive. Computer‐based instruction (CBI) programs may provide a more efficient and cost‐effective alternative to live training if the CBI program is as effective as BST in producing accurate implementation. The current study compared CBI to BST to train novice undergraduate students to conduct discrete‐trial teaching. Participants were randomly assigned to one of the two conditions and assessed prior to and after the completion of training. Results indicated that although both BST and CBI were effective at training participants to implement discrete‐trial teaching, BST was slightly but significantly more effective whereas CBI quickly created a return on the investment of product development.     

Stimulus presentation order in receptive identification tasks: A systematic replication

Conflicting recommendations exist in the literature regarding the optimal order of stimulus presentation when teaching auditory–visual conditional discriminations. The present study examined the generality of a previously demonstrated advantage of presenting the auditory sample before visual comparisons (sample‐first condition) over the reverse sequence (comparison‐first condition). Participants were four typically developing 5‐ and 6‐year‐old boys. The procedures of Petursdottir and Aguilar (2016) were systematically replicated with the addition of a prompted error correction trial following each incorrect response. Overall, there were more instances of quicker mastery in the sample‐first condition (four of seven evaluations) than in the comparison‐first condition (two of seven evaluations). A comparison‐first advantage was associated with slower acquisition in both conditions than in the remaining evaluations, and an analysis of stimulus and position bias yielded tentative evidence for unwanted sources of stimulus control.     

The psychology of diversity and its implications for workplace (in)equality: Looking back at the last decade and forward to the next

In this British Psychological Society (BPS) landmark paper, we employ an evidence synthesis approach to review the broad range of diversity research published in BPS journals between 2011 and 2021. By focusing on research that investigates stereotypes associated with, and discrimination towards, minority and minoritized groups, we seek to provide readers with a better understanding of the dynamics of a diverse workforce and, going forward, to facilitate the efforts of the psychology research community towards building a body of work that meaningfully addresses workplace inequalities. We thematically analyse and synthesize 25 articles, which fall into four interconnected themes: identity development and management; negative stereotypes, prejudice, and discrimination; working in a diverse team; and the broader organizational environment. Highlighting key strengths of this work and areas for future development, we note the absence of overarching theoretical debates and discussions that might facilitate the development of an on-going narrative across diversity-related research published within BPS journals. We outline a future research agenda to bridge methodological divides and to connect with diversity literatures in related disciplines such as human resource development (HRD), human resource management (HRM), and organization studies. In so doing, we advocate for psychologists to move beyond a solely individualistic perspective and instead recognize and account for the context within which diversity-related processes take place.     

Perceived optimality of competing solutions to the Euclidean travelling salesperson problem

The Travelling Salesperson Problem (TSP) is a nondeterministic-polynomial hard (NP-hard) combinatorial problem that occurs in a wide range of industrial domains, including logistics, route finding, and computer wiring. Interestingly, despite the problem’s inherent computational difficulty, when presented in Euclidean space (ETSP), human participants can produce close-to-optimal solutions in near-linear time. However, when asked to compare and select the most optimum solution from a set of pre-defined competing solution options, participants can struggle. In this study we investigate this paradox by asking participants to compare four closed-loop Euclidean TSP solutions, in order to determine which solution they perceived to have the most optimal tour cost. We hypothesise that the extracted geometric properties have an effect on stimulus selection in a discrimination task (selection or no selection). Accordingly, we extracted four geometric properties from competing stimuli in order to create a perceptual activation function. Predictive analytics demonstrated that a classification model could identify the most optimal solution 97% of the time using the perceptual activation scores alone, yet human participants only correctly determined the most optimal solution 47% of the time. Mixed-effects models suggest that ‘likelihood of stimulus selection’ can be modelled as a function of the weighted coefficients of competing perceptual activation scores within each trial; however only a small amount of the variance is explained by these perceptual activation scores. Finally, a drift–diffusion model was used to create a theoretical framework of how likelihood of stimulus selection is influenced by competing perceptual activators. Our study highlights a novel way of extracting and analysing the importance of geometric properties that influence ETSP discrimination tasks, and links this analysis to human behaviour when discriminating between competing ETSP solutions.     

The relationship between discrimination and memory for spacing and feature changes in houses

Adults need to discriminate between stimuli and recognize those previously seen. For faces, feature changes (e.g., different eyes) and spacing changes (e.g., distances between eyes) are important cues. In two experiments, we assessed the influence of these on discrimination and recognition of houses, a commonly used control in face studies. In both experiments, discrimination was better for feature than spacing changes. Memory for spacing changes was generally poor but aided by extra learning and intermixing change types. Conversely, memory for features was good, especially when there were few houses, and change type was blocked. Unexpectedly, memory was best for differences that might signal something about occupants (e.g., changes to garden or bins), perhaps akin to hairstyles for faces. Overall, results are consistent with previous work showing poor discrimination of spacing in non-face objects and extends them to show that, unlike for faces, spacing differences are also not well remembered.     

Visual dominance in the pigeon

In Experiment 1, three pigeons were trained to obtain grain by depressing one foot treadle in the presence of a 746-Hertz tone stimulus and by depressing a second foot treadle in the presence of a red light stimulus. Intertrial stimuli included white light and the absence of tone. The latencies to respond on auditory element trials were as fast, or faster, than on visual element trials, but pigeons always responded on the visual treadle when presented with a compound stimulus composed of the auditory and visual elements. In Experiment 2, pigeons were trained on the auditory-visual discrimination task using as trial stimuli increases in the intensity of auditory or visual intertrial stimuli. Again, pigeons showed visual dominance on subsequent compound stimulus test trials. In Experiment 3, on compound test trials, the onset of the visual stimulus was delayed relative to the onset of the auditory stimulus. Visual treadle responses generally occurred with delay intervals of less than 500 milliseconds, and auditory treadle responses generally occurred with delay intervals of greater than 500 milliseconds. The results are discussed in terms of Posner, Nissen, and Klein's (1976) theory of visual dominance in humans.     

Effects of morphine, clonidine, and intensity change on electric-shock discrimination.

The effects of morphine, clonidine, and changes in stimulus intensity were examined in squirrel monkeys responding on one of two levers following brief presentations of one of two electric-shock intensities (0.1 and 0.5 mA). Responses were designated as correct or incorrect depending on which shock intensity had been presented and which lever was pressed. Morphine (0.42 to 1.80 mg/kg) and clonidine (0.075 to 0.18 mg/kg) decreased percentage correct responding. Morphine and clonidine also increased response latency and the number of shock presentations that were not followed by responses. Changes in shock intensity also decreased percentage correct responding but had no effect on response latency or on the number of shock presentations not followed by responses.     

Attention in the pigeon: testing for excitatory and inhibitory control by the weak elements.

In two experiments, pigeons were trained on a successive discrimination between a color and either a compound S+ or a compound S- consisting of a form superimposed on a second color. Two stimulus control tests followed discrimination training: an attention test in which the form and colors used in training were presented singly and in combination, and then a resistance-to-reinforcement test using the form element of S+ or S- and a novel form. In the attention test, the birds trained with a compound S+ responded most to the S+ compound, less to the S+ color alone, and still less to the S+ form on a dark key. Few responses were made to the negative stimulus, either alone or with the S+ form added. The birds trained with a compound S- pecked most at the S+ color and to a compound of the S+ color with the S- form added. The resistance-to-reinforcement test showed that the birds trained with a compound S+ responded more to the S+ form than to a novel form. However, the birds trained with a compound S- did not reliably respond more to a novel form than to the S- form. These findings suggested that the form element of a compound S+ gains some excitatory control, but the form element of a compound S- does not acquire inhibitory control. The possibility existed that low levels of responding to the S+ form on a dark background in the first experiment were due to use of a darkened key to separate S+ and S- periods during discrimination training. However, the essential findings were the same in a second experiment in which darkening of the chamber separated S+ and S- periods.     

附加点作用下两点距离的触觉辨别

在被动触觉的距离知觉实验中,被试的右手保持不动,将各种三点型式的刺激轻轻接触食指腹侧或以一定速度通过其表面,要求被试判定外侧两点的直线距离并在一根量尺上复现出来．结果发现：（１）当刺激快速通过皮肤表面时,外侧两点距离表现出低估,其知觉距离显著地小于刺激静止或慢速运动条件下的知觉距离;（２）当中间附加点偏离外侧两点间想象连线较大时,外侧两点的知觉距离显著地小于中间附加点偏离较小时的知觉距离,偏离较大的中间附加点似乎将外侧两点拉近了,缩短了其知觉距离,出现知觉亲和现象．这种现象与刺激是否运动无关．     

个体和群体歧视知觉对流动儿童主观幸福感的影响

采用整班联系、自愿参加的方式,通过匿名方式对北京市1552名流动儿童施测个体和群体歧视知觉问卷、积极/消极情感量表、生活满意度量表、内群体认同测验与群体地位感测验,探讨个体和群体歧视知觉对流动儿童主观幸福感的影响及内群体认同感和群体地位感在其中的中介作用。结果表明：（1）个体和群体歧视知觉与流动儿童的主观幸福感、内群体情感认同及群体地位感之间存在显著性相关,与内群体认知认同之间相关不显著。（2）个体歧视知觉对流动儿童的主观幸福感存在直接显著的负向预测作用,并通过降低流动儿童的群体地位感,进而间接地负向影响流动儿童的主观幸福感;（3）群体歧视知觉对流动儿童的主观幸福感也存在直接显著的消极影响,并同时借助于群体地位感的中介作用、以及内群体情感认同和群体地位感的双重中介作用间接地降低流动儿童的主观幸福感。