Blocking with serial and simultaneous compounds in a trace conditioning procedure

Blocking of conditioned suppression in rats was studied in three experiments using serial and simultaneous compounds in Pavlovian trace conditioning procedures. Experimental groups were first given trace conditioning trials with a 2-sec stimulus (A) presented at least 60 sec before an electric grid shock US. Next, both experimental and control groups received reinforced trials with a compound stimulus (AB). Both A and B were 2 sec in duration and were presented at least 60 sec before the US. For some groups during AB training, the A stimulus preceded the B stimulus; for others, B preceded A; for still others, A and B occurred simultaneously. Conditioning was subsequently assessed separately to both A and B. The results were as follows: First, varying the interval between the onset of A and the US during A training appeared to produce significantly different levels of conditioning to A but did not detectably affect A’s ability to block conditioning to B. Second, blocking was observed in both simultaneous and serial procedures. Third, in the serial procedure, A blocked conditioning to B whether it preceded B or followed B in the AB compound. Fourth, in tests given after AB conditioning, the experimental and control groups suppressed similarly to A. The relevance of these results to the conditioning model of Rescorla and Wagner (1972) and to Mackintosh’s (1975b) theory of attention are discussed.     

Impact of legislation on post‐school transition practice for young people with additional support needs in Scotland

A longitudinal study was conducted to understand post‐school transition practice for young people with additional support needs (ASN) before and after the implementation of key legislation, the Education (Additional Support for Learning) (Scotland) Act 2004, amended in 2009. Primary data were collected from one local authority in Scotland. Twelve professionals involved in post‐school transition planning were interviewed in 2004 and eight in 2010. Minutes of transition meetings from one school for three young people prior to the implementation of the Act and four after the implementation were analysed. Results show some changes since the implementation of the Act.     

Parent Praise to 1‐ to 3‐Year‐Olds Predicts Children's Motivational Frameworks 5 Years Later

In laboratory studies, praising children's effort encourages them to adopt incremental motivational frameworks—they believe ability is malleable, attribute success to hard work, enjoy challenges, and generate strategies for improvement. In contrast, praising children's inherent abilities encourages them to adopt fixed‐ability frameworks. Does the praise parents spontaneously give children at home show the same effects? Although parents' early praise of inherent characteristics was not associated with children's later fixed‐ability frameworks, parents' praise of children's effort at 14–38 months (N = 53) did predict incremental frameworks at 7–8 years, suggesting that causal mechanisms identified in experimental work may be operating in home environments.     

Mobilities of gaseous ions in CH3NO2H2 and CH3CNH2 mixtures

Extending previous investigations by Loeb of mobilities in gaseous mixtures using his procedure except that the auxiliary field in these measurements was made equal to the advancing field thus giving absolute values of the mobilities, measurements of mobilities were made in mixtures of CH₃NO₂H2 and CH₃CNH₂. The mobilities in H₂ were 7.12 for the positive ions and 10.46 for the negative ions in cm./sec. per volt/cm. Those in CH₃NO₂ were 0.221 cm./sec. per volt/cm. for both ions and in CH₃CN they were 0.234 cm./sec. per volt/cm. for both ions. Both ion mobilities deviated from Blanc's law in CH₃NO₂ indicating the formation of complexes with the CH₃NO₂ ions somewhat greater in size than the normal ions in H₂. The molecules attached to negative ions somewhat less readily than to the positive ions but both final ions were of the same size. In CH₃CN mixtures both positive and negative ions deviated from Blanc's law, the positive ion showing more ready attachment of CH₃CN. The negative ion had consistently a higher mobility than the positive ion, a circumstance indicating a smaller ion and suggesting that the attaching molecule might not be CH₃CN but some impurity. Both ion addition products in CH₃CN are larger than the normal ion in H₂ but smaller than those in CH₃NO₂ as was to be expected.     

Relationships among stress,coping, and mental health in high‐achieving high school students

This study investigates the relationships among stress, coping, and mental health in 139 students participating in an International Baccalaureate (IB) high school diploma program. Mental health was assessed using both positive indicators (life satisfaction, academic achievement, academic self‐efficacy) and negative indicators (psychopathology) of adolescent social‐emotional and school functioning. Findings include that students in an IB program perceive significantly more stress than a sample of 168 of their general education peers, and that specific coping styles are differentially related to mental health outcomes in this subgroup of high‐achieving high school students. Furthermore, coping styles (specifically, anger and positive appraisal) moderate the influence of stress on global life satisfaction and internalizing symptoms of psychopathology. © 2008 Wiley Periodicals, Inc.     

Distress and Suicidality in Higher Education: Implications for Population-Oriented Prevention Paradigms

College students respond to stressful experiences along a continuum of distress and suicidality. This study investigated, from students’ perspectives, the contributors to stress, nature of stress, coping strategies used, and role of drugs and alcohol during stressful periods—all with particular relevance for suicidality. Undergraduate and graduate students were sampled on an online survey from 73 institutions, totaling 26,292 respondents. The pervasiveness of stressful experiences students endorse appears to be more than traditional clinical interventions can manage on their own. Recommendations are, therefore, made about how to utilize population-based prevention to reduce students’ distress and suicidality and improve their mental health.