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121.
Adolescence is characterized by increased risk-taking, novelty-seeking, and locomotor activity, all of which suggest a heightened appetitive drive. The neurotransmitter dopamine is typically associated with behavioral activation and heightened forms of appetitive behavior in mammalian species, and this pattern of activation has been described in terms of a neurobehavioral system that underlies incentive-motivated behavior. Adolescence may be a time of elevated activity within this system. This review provides a summary of changes within cortical and subcortical dopaminergic systems that may account for changes in cognition and affect that characterize adolescent behavior. Because there is a dearth of information regarding neurochemical changes in human adolescents, models for assessing links between neurochemical activity and behavior in human adolescents will be described using molecular genetic techniques. Furthermore, we will suggest how these techniques can be combined with other methods such as pharmacology to measure the impact of dopamine activity on behavior and how this relation changes through the lifespan. 相似文献
122.
David Stokes Rebecca Mathews Dr Brin F. S. Grenyer Katherine Crea 《Australian psychologist》2010,45(3):178-188
A detailed analysis of the different sectors of the psychology workforce was conducted as part of the National Psychology Workforce Survey: Independent Private Practice (IPP), Employed in Public Sector (EPuS) and Employed in Private Sector (EPrS). A total of 11,897 psychologists responded to the workforce survey, a response rate of 48%. Of these 8,086 were fully registered and currently working in a psychology role. Sectors were compared on a range of practice characteristics and differences were explored using a series of ANOVAs and post‐hoc analyses. Results of analyses revealed qualitative differences between the three sectors. Strategies for maintaining the employed workforce were also collected and are reported to be as much about increasing work satisfaction and support for professional and development opportunities as about salary. 相似文献
123.
Research on the relationship between the representation of space and time has produced two contrasting proposals. ATOM posits that space and time are represented via a common magnitude system, suggesting a symmetrical relationship between space and time. According to metaphor theory, however, representations of time depend on representations of space asymmetrically. Previous findings in humans have supported metaphor theory. Here, we investigate the relationship between time and space in a nonverbal species, by testing whether non-human primates show space–time interactions consistent with metaphor theory or with ATOM. We tested two rhesus monkeys and 16 adult humans in a nonverbal task that assessed the influence of an irrelevant dimension (time or space) on a relevant dimension (space or time). In humans, spatial extent had a large effect on time judgments whereas time had a small effect on spatial judgments. In monkeys, both spatial and temporal manipulations showed large bi-directional effects on judgments. In contrast to humans, spatial manipulations in monkeys did not produce a larger effect on temporal judgments than the reverse. Thus, consistent with previous findings, human adults showed asymmetrical space–time interactions that were predicted by metaphor theory. In contrast, monkeys showed patterns that were more consistent with ATOM. 相似文献
124.
125.
Psychonomic Bulletin & Review - 相似文献
126.
Stokes Ryan C. Venezia Jonathan H. Hickok Gregory 《Psychonomic bulletin & review》2019,26(4):1354-1366
Psychonomic Bulletin & Review - Recent evidence suggests that the motor system may have a facilitatory role in speech perception during noisy listening conditions. Studies clearly show an... 相似文献
127.
Jed A. Diekfuss Christopher K. Rhea Randy J. Schmitz Dustin R. Grooms Robin W. Wilkins Alexis B. Slutsky 《Journal of motor behavior》2019,51(3):281-292
This study examined the training effect of attentional focus (external focus, internal focus, or no focus instructions) on a dynamic balance task. Participants completed baseline balance testing, seven consecutive days of dynamic balance board training, and retention testing 24 hours after the last session. The novel finding of this study was the presence of a training effect on balance control when adopting an external focus relative to an internal focus or no focus instructions. Further, we report the unique observation that more patterned behavior was adopted regardless of the focus instructions. These findings provide insight into how instructions can be altered to enhance human balance control and complement the constrained-action hypothesis. 相似文献
128.
Reciprocal Relationships Between Parenting Behavior and Disruptive Psychopathology from Childhood Through Adolescence 总被引:2,自引:1,他引:1
Theoretical models suggest that child behaviors influence parenting behaviors, and specifically that unpleasant child behaviors coerce parents to discontinue engaging in appropriate discipline. This study examined reciprocal relationships between parenting behaviors (supervision, communication, involvement, timid discipline and harsh punishment) and child disruptive disorder symptoms (ADHD, ODD and CD) in a clinic-referred sample of 177 boys. Annual measures, including structured clinical interviews, were obtained from the beginning of the study (when boys were between the ages of 7 to 12) to age 17. Specific reciprocal influence was observed; only timid discipline predicted worsening behavior, namely ODD symptoms, and ODD symptoms predicted increases in timid discipline. Greater influence from child behaviors to parenting practices was found: ODD also predicted poorer communication and decreased involvement, and CD predicted poorer supervision. ADHD was neither predictive of, nor predicted by, parenting behaviors. The results are specifically supportive of a coercive process between child behaviors and parenting behaviors, and generally suggestive of greater influence of child behaviors on parenting behaviors than of parenting behaviors on child behaviors. 相似文献
129.
Bayesian IRT Guessing Models for Partial Guessing Behaviors 总被引:1,自引:0,他引:1
According to the recent Nation’s Report Card, 12th-graders failed to produce gains on the 2005 National Assessment of Educational
Progress (NAEP) despite earning better grades on average. One possible explanation is that 12th-graders were not motivated
taking the NAEP, which is a low-stakes test. We develop three Bayesian IRT mixture models to describe the results from a group
of examinees including both nonguessers and partial guessers. The first assumes that the guesser answers questions based on
his or her knowledge up to a certain test item, and guesses thereafter. The second model assumes that the guesser answers
relatively easy questions based on his or her knowledge and guesses randomly on the remaining items. The third is constructed
to describe more general low-motivation behavior. It assumes that the guesser gives less and less effort as he or she proceeds
through the test. The models can provide not only consistent estimates of IRT parameters but also estimates of each examinee’s
nonguesser/guesser status and degree of guessing behavior. We show results of a simulation study comparing the performance
of the three guessing models to the 2PL-IRT model. Finally, an analysis of real data from a low-stakes test administered to
university students is presented. 相似文献
130.