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901.
902.
Valentina Cartei Wind Cowles Robin Banerjee David Reby 《The British journal of developmental psychology》2014,32(1):100-106
Adult listeners are capable of identifying the gender of speakers as young as 4 years old from their voice. In the absence of a clear anatomical dimorphism in the dimensions of pre‐pubertal boys' and girls' vocal apparatus, the observed gender differences may reflect children's regulation of their vocal behaviour. A detailed acoustic analysis was conducted of the utterances of 34 6‐ to 9‐year‐old children, in their normal voices and also when asked explicitly to speak like a boy or a girl. Results showed statistically significant shifts in fundamental and formant frequency values towards those expected from the sex dimorphism in adult voices. Directions for future research on the role of vocal behaviours in pre‐pubertal children's expression of gender are considered. 相似文献
903.
Countries Mimicking Neighbors: The Spatial Diffusion of Governmental Restrictions on Religion 下载免费PDF全文
Dane R. Mataic 《Journal for the scientific study of religion》2018,57(2):221-237
Conceptualized as efforts to deny religious freedoms, previous research explains the presence of governmental restrictions on religion by isolating national governments, asserting that the primary determinant is a country's internal structural characteristics. These approaches overlook why the levels of governmental restriction on religion are spatially clustered and increasing in distinct patterns. Utilizing spatial analysis and data from the Religion and State Project, this article demonstrates that governmental restrictions on religion are spatially clustered, not independent from neighboring countries, and that increases in a country's level of restrictions reflect similar changes in bordering countries. Spatial clustering emerges through the diffusion of policies, where national governments mimic their neighbor's policies and practices even when accounting for internal structural characteristics. The article concludes that while a country's internal structure is clearly a predictor of policies, national governments are not isolated from neighbors where the level of restrictions are susceptible to external influence. 相似文献
904.
905.
Kaneen B. Geiger Linda A. LeBlanc Katie Hubik Sarah R. Jenkins James E. Carr 《Journal of applied behavior analysis》2018,51(2):220-235
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. 相似文献
906.
Kiley A. Schneider Bailey Devine Gabriella Aguilar Anna Ingeborg Petursdottir 《Journal of applied behavior analysis》2018,51(3):634-646
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. 相似文献
907.
Elberto A. Plazas Carlos‐Wilcen Villamil 《Journal of the experimental analysis of behavior》2018,109(2):380-393
This study presents three experiments that aimed to show the formation of stimulus equivalence relations among stimuli that had been previously related only by exclusion. In Experiment 1, participants were trained on baseline conditional discriminations to establish two 3‐member equivalence classes. Then, they were exposed to exclusion trials, without feedback, in which undefined stimuli had to be matched by rejecting the defined baseline stimuli. Finally, participants responded to test trials evaluating the emergence of symmetry and transitivity among the undefined stimuli from the exclusion trials. For half of the participants, the stimuli related by exclusion were introduced as S‐ stimuli in the baseline trials, whereas for the other half they were not. Further, half of the participants were assessed for emergent relations with stimuli from all the classes, whereas the other half was assessed for emergent relations with only the stimuli related by exclusion. In Experiment 2, the S‐ comparisons in the emergent relations test trials with stimuli only related by exclusion were stimuli from a null class. In Experiment 3, the number of exclusion trials was doubled. Across experiments, most participants showed emergence of equivalence relations among the stimuli related by exclusion. Some conditions of stimulus control associated with exclusion learning and the emergence of equivalence relations are discussed. 相似文献
908.
Michael Davison 《Journal of the experimental analysis of behavior》2018,109(1):107-124
Responding on concurrent schedules produced a conditional discrimination (Phases 1 and 2), asking either which peck produced the event, or which color the keys were when the event was produced. In Phases 3 and 4, reinforcer delivery or a delay in blackout was interpolated between responding and the conditional discrimination. In Phase 1, location versus color discrimination accuracy was controlled by the relative reinforcer frequency for correct responses to these questions (divided stimulus control). In Phases 2 to 4, relative reinforcer frequency for correct responses to these questions was .5, and the relative frequency with which concurrent‐schedule responses produced the questions was varied. This variation had no clear effect on the accuracy of reporting Location or Color. These results are consistent with the model of divided control suggested by Davison and Elliffe (2010). Arranging a 3‐s reinforcer between responding and choice decreased both color and location accuracy, but a 3‐s delay only decreased location accuracy. Thus, in concurrent‐schedule performance, both ambient stimuli prior to a reinforcer and the location of the just‐reinforced response are available as discriminative stimuli following the reinforcer. Control of postreinforcer responding is divided between these according to their association with the relative frequency of subsequent reinforcers. 相似文献
909.
While trauma is, by definition, a necessary precursor of posttraumatic growth, other aspects of individuals’ life experiences affect their ability to cope with trauma, foster resilience, and grow following adversity. Most research on posttraumatic growth overlooks the accumulation of trauma and sub-trauma stressors as possible predictors of growth. In addition, most research on cumulative adversity omits all but the most extreme examples of discrimination and sexual harassment stressors. This exploratory study of 46 university students with trauma histories used measures of posttraumatic growth, trauma, major (sub-trauma) life events, chronic stressors, sexual harassment, and discrimination to examine the relationship between cumulative adversity and the development of posttraumatic growth. We found that cumulative adversity is positively correlated with posttraumatic growth, and that there are important relationships between gender, race, and cumulative adversity. A hypothesized curvilinear relationship between cumulative adversity and posttraumatic growth was not supported. These findings suggest that successfully coping with some amount of sub-trauma adversity may facilitate the development of posttraumatic growth. Additionally, sexual harassment and discrimination were closely linked to the number of chronic stressors; thus, they need to be included in measures of cumulative adversity to more fully represent the experiences of marginalized groups. 相似文献
910.
Fabio Del Missier Alessia Sassano Valentina Coni Martina Salomonsson Timo Mäntylä 《Memory (Hove, England)》2018,26(5):697-711
Although a number of theoretical accounts of proactive interference (PI) in episodic memory have been proposed, existing empirical evidence does not support conclusively a single view yet. In two experiments we tested the predictions of the temporal discrimination theory of PI against alternative accounts by manipulating the presentation schedule of study materials (lists blocked by category vs. interleaved). In line with the temporal discrimination theory, we observed a clear buildup of (and release from) PI in the blocked condition, in which all the lists of the same category were presented sequentially. In the interleaved condition, with alternating lists of different categories, a more gradual and smoother buildup of PI was observed. When participants were left free to choose their presentation schedule, they spontaneously adopted an interleaved schedule, resulting again in more gradual PI. After longer delays, we observed recency effects at the list level in overall recall and, in the blocked condition, PI-related effects. The overall pattern of findings agrees with the predictions of the temporal discrimination theory of PI, complemented with categorical processing of list items, but not with alternative accounts, shedding light on the dynamics and underpinnings of PI under diverse presentation schedules and over different time scales. 相似文献