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31.
A new group-training procedure for habituation demonstrates that presynaptic glutamate release contributes to long-term memory in Caenorhabditis elegans 总被引:2,自引:0,他引:2
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In the experiments reported here we have developed a new group-training protocol for assessing long-term memory for habituation in Caenorhabditis elegans. We have replicated all of the major findings of the original single-worm protocol using the new protocol: (1) distributed training produced long-term retention of training, massed training did not; (2) distributed training at long interstimulus intervals (ISIs) produced long-term retention, short ISIs did not; and (3) long-term memory for distributed training is protein synthesis-dependent as it could be blocked by heat shock during the inter-block interval. In addition, we have shown that long-term memory for habituation is graded, depending on the number of blocks of stimuli in training. The inter-block interval must be >40 min for long-term retention of training to occur. Finally, we have tested long-term memory for habituation training in a strain of worms with a mutation in a vesicular glutamate transporter in the sensory neurons that transduce tap (eat-4). The results from these eat-4 worms indicate that glutamate release from the sensory neurons has an important role in the formation of long-term memory for habituation. 相似文献
32.
Johnston C Fine S Weiss M Weiss J Weiss G Freeman WS 《Journal of abnormal child psychology》2000,28(4):371-382
Participants were 55 children with attention deficit hyperactivity disorder (ADHD) who were receiving ongoing treatment with stimulant medications and their mothers, and 31 children with ADHD who were beginning stimulant medication and their mothers. Mothers and children offered attributions for child behaviors that occurred when the child was medicated and not medicated. Mothers rated child compliance and prosocial behavior as more global and stable when the child was medicated and rated noncompliance, ADHD symptoms, and oppositional behavior as more externally caused, less global and stable, but more controllable by the child when the child was medicated. Children rated both their compliance and noncompliance as more controllable in the medicated condition. On a forced-choice measure, both mothers and children selected ability, effort, and task attributions for compliance more in the not-medicated condition, and pill-taking attributions more in the medicated condition. This was reversed for noncompliance, which was attributed more to effort, task, or ability in the medicated condition and more to not taking a pill in the not-medicated condition. The potential risks and benefits for parent–child interactions and children's self-perceptions of these medication-related differences in attributions are discussed. 相似文献
33.
Laures JS 《Brain and language》2005,95(2):353-357
Research indicates that attentional deficits exist in aphasic individuals. However, relatively little is known about auditory vigilance performance in individuals with aphasia. The current study explores reaction time (RT) and accuracy in 10 aphasic participants and 10 nonbrain-damaged controls during linguistic and nonlinguistic auditory vigilance tasks. Findings indicate that the aphasic group was less accurate during both tasks than the control group, but was not slower in their accurate responses. Further examination of the data revealed variability in the aphasic participants' RT contributing to the lower accuracy scores. 相似文献
34.
The Partners for Change Outcome Management System: A Both/And System for Collaborative Practice
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Systematic client feedback (SCF) is increasingly employed in mental health services worldwide. While research supports its efficacy over treatment as usual, clinicians, especially those who highly value relational practices, may be concerned that routine data collection detracts from clinical process. This article describes one SCF system, the Partners for Change Outcome Management System (PCOMS), along a normative (standardized measurement) to communicative (conversational) continuum, highlighting PCOMS’ origins in everyday clinical practice. The authors contend that PCOMS represents “both/and,” providing a valid signal of client progress while facilitating communicative process particularly prized by family therapists steeped in relational traditions. The article discusses application of PCOMS in systemic practice and describes how it actualizes time‐honored family therapy approaches. The importance of giving voice to individualized client experience is emphasized. 相似文献
35.
Neil Conway Jacqueline A.‐M. Coyle‐Shapiro 《Journal of Occupational & Organizational Psychology》2012,85(2):277-299
This study investigated the reciprocal relationship between perceptions of psychological contract fulfilment and employee performance (sales made and sales targets), and whether this was moderated by the quality and length of the social exchange relationship captured, respectively, through perceived organizational support (POS) and organizational tenure. We used a sample of 146 sales advisors and a four‐point longitudinal design and found support for reciprocal links where performance predicted subsequent psychological contract fulfilment and vice versa. The strength of the relationship between performance and psychological contract fulfilment increased over time. The quality of the social exchange relationship (i.e., POS) moderated reciprocal links between sales made and sales targets met and perceptions of psychological contract fulfilment at earlier, but not later, time points. One way to interpret the findings is the changing nature of the unfolding relationship between support, psychological contract fulfilment, and performance, where a supportive relationship buffers failing to deliver at earlier time points, but at later time points employee performance and psychological contract fulfilment associate more strongly as both parties prioritize delivery. 相似文献
36.
37.
Understanding the perception of multiracial persons is increasingly important in today's diverse society. The present research investigated the process of categorizing multiracial persons as “Multiracial.” We hypothesized that perceivers would make fewer Multiracial categorizations of multiracials and that these categorizations would take longer than monoracial categorizations. We found support for these hypotheses across six experiments. Experiment 1 demonstrated that perceivers did not categorize morphed Black–White faces as Multiracial with the same frequency with which they categorized Black and White faces as Black and White (respectively), and that categorizations of multiracials as Multiracial took longer than monoracial categorizations. Experiment 2 replicated and extended these effects to real Black–White faces. Experiment 3 showed that these findings generalized to Asian–White faces. We used pixel variance analysis to show that these effects were not due to increased variance among Multiracial faces. The image analysis showed that the Black–White morphs and real biracials were actually less varied than either the Black or White sets of faces. Experiments 4 and 5 demonstrated that cognitive load and time constraints detrimentally affected multiracial, but not monoracial, categorizations. Experiment 6 showed that imbuing monoracial categories with importance decreases the use of the Multiracial category. Implications of these findings for understanding perceptions of multiracial persons are discussed. 相似文献
38.
Collishaw S Gardner F Maughan B Scott J Pickles A 《Journal of abnormal child psychology》2012,40(1):119-132
The coincidence of historical trends in youth antisocial behavior and change in family demographics has led to speculation
of a causal link, possibly mediated by declining quality of parenting and parent–child relationships. No study to date has
directly assessed whether and how parenting and parent–child relationships have changed. Two national samples of English adolescents
aged 16–17 years in 1986 (N = 4,524 adolescents, 7,120 parents) and 2006 (N = 716 adolescents, 734 parents) were compared using identical questionnaire assessments. Youth-reported parental monitoring,
expectations, and parent–child quality time increased between 1986 and 2006. Ratings of parental interest did not change.
Parenting differences between affluent and disadvantaged families narrowed over time. There was thus little evidence of a
decline in quality of parenting for the population as a whole or for disadvantaged subgroups. Parent-reported youth conduct
problems showed a modest increase between 1986 and 2006. Findings suggested that the increase in youth conduct problems was
largely unrelated to observed change in parent–child relationships. 相似文献
39.
Hesson J 《Brain and cognition》2012,80(1):89-95
This study looked at cumulative lifetime estrogen exposure, as estimated with a mathematical index (Index of Cumulative Estrogen Exposure (ICEE)) that included variables (length of time on estrogen therapy, age at menarche and menopause, postmenopausal body mass index, time since menopause, nulliparity and duration of breastfeeding) known to influence estrogen levels across the life span, and performance on prospective and retrospective memory measures in a group of 50 postmenopausal women (mean age=69.3years) who, if they were current or former users of estrogen therapy, had started therapy within 5years of menopause. The ICEE was found to be a significant predictor of performance on the Prospective Memory task (F(1)=4.21, p=.046, η(p)(2)=.084). No significant relationship was noted between the ICEE and performance on measures of retrospective memory. The results suggest that the level of cumulative lifetime exposure to estrogen a woman has influences her prospective memory performance later in life and that the influence of reproductive and biological markers of endogenous estrogen exposure are relevant factors to consider when studying the effect of estrogen therapy on cognitive functioning in postmenopausal women. In addition, the finding that performance on a measure of prospective memory, but not performance on measures of retrospective memory, was associated with the ICEE adds further support to the theory that the frontal cortex may be especially sensitive to estrogen. 相似文献
40.
Kristin Duppong Hurley Jacqueline Huscroft-D’Angelo Alexandra Trout Annette Griffith Michael Epstein 《Journal of child and family studies》2014,23(5):812-823
There are many measures that assess parenting skills or practices, such as behavior, beliefs, coping mechanisms, reactions to stress, or discipline. However, little is known about the psychometric quality of these parenting measures. This information is essential for practitioners and researchers to aide in the selection of the most valid and reliable measures to assess parenting behavior or attitudes. This study examined the psychometric quality among parenting measures published from 1985 to 2009. After the initial search 164 measures were identified, but were reduced to 25 measures that supplied some degree of psychometric information, were published in the United States or Canada, and were in English. Measures were compared across numerous categories including respondent type, norming data, administration type, and ten psychometric variables such as internal consistency, content validity, and predictive validity. Out of the 25 measures, seven had no acceptable psychometric properties, seven had only 1–2 acceptable ratings on psychometric properties, six had between 3 and 4 acceptable psychometric ratings, none had between 5 and 6 acceptable ratings, and only five had strong psychometric properties in seven or more of the 10 categories. Likewise, only five measures provided and norming information and 14 measures provided scoring procedures. Implications, limitations, and recommendations for future research are discussed. 相似文献