MODELLING OF MICROSTRUCTURE EVOLUTION AND PROPERTIES OF LOW-CARBON STEELS

1.IntroductionMicrostructureprocessmodelsareincreasinglyonhotstriprollingofste.l[1--7].Thesemodelsfrequentlyincorporateagreatdealofempiricismwithcomparativelytightprocessrangesofapplicability.Morefundamentallybasedprocessmodelsarerequiredtodeveloppredictivetoolstooptimizetheproductionforawiderangeofmilldesignsandprocessingconditions.Theprocessofhotstriprollingoflow--carbonsteelscanbesubdividedintothreeprin-cipalstages:(i)reheating,(n)rollingand(iii)cooling(watercoolingontherun--outtableandsubs…     

ELIMIMATION OF RANDOM DEFACTS IN AEROSPACE MATERIALS

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When self-efficacy negatively relates to motivation and performance in a learning context.

Recent reviews of the training literature have advocated directly manipulating self-efficacy in an attempt to improve the motivation of trainees. However, self-regulation theories conceive of motivation as a function of various goal processes, and assert that the effect of self-efficacy should depend on the process involved. Training contexts may evoke planning processes in which self-efficacy might negatively relate to motivation. Yet the typical between-persons studies in the current literature may obscure the effect. To examine this issue, 63 undergraduate students completed a series of questionnaires measuring self-efficacy and motivation before 5 class exams. Self-efficacy was negatively related to motivation and exam performance at the within-person level of analysis, despite a significant positive relation with performance at the between-persons level. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Goal constructs in psychology: Structure, process, and content.

Goals and related constructs are ubiquitous in psychological research and span the history of psychology. Research on goals has accumulated sporadically through research programs in cognition, personality, and motivation. Goals are defined as internal representations of desired states. In this article, the authors review the theoretical development of the structure and properties of goals, goal establishment and striving processes, and goal-content taxonomies. They discuss affect as antecedent, consequence, and content of goals and argue for integrating across psychological content areas to study goal-directed cognition and action more efficiently. They emphasize the structural and dynamic aspects of pursuing multiple goals, parallel processing, and the parsimony provided by the goal construct. Finally, they advocate construct validation of a taxonomy of goals. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The Depth of History and Explanation as Benefit and Bane for Psychological Control Theories.

A longstanding debate has recently re-erupted in the self-regulation literature around the concept of self-efficacy. This article presents an argument that the debate emerges from a lack of understanding of the history of control theories within both the social and physical sciences and the various levels of explanation to which phenomena can be subjected. This history, coupled with the issues of determinism, materialism, and empiricism evoked by the deeper level of explanation that some versions of control theory provide, has led some critics to misapply nonpsychological properties to control theories and obscure their usefulness. Here, the usefulness of a deeper control theory level of explanation is illustrated using comparisons with explanations found in goal-setting theory and social cognitive theory. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The changing signs in the relationships among self-efficacy, personal goals, and performance.

The common interpretation of the positive correlation among self-efficacy, personal goals, and performance is questioned. Using self-efficacy theory (A. Bandura, 1977), it was predicted that cross-sectional correlational results were a function of past performance's influence on self-efficacy, and using control theory (W. T. Powers, 1973), it was predicted that self-efficacy could negatively influence subsequent performance. These predictions were supported with 56 undergraduate participants, using a within-person procedure. Personal goals were also positively influenced by self-efficacy and performance but negatively related to subsequent performance. A 2nd study involving 185 undergraduates found that manipulated goal level positively predicted performance and self-efficacy positively predicted performance in the difficult-goal condition. The discussion focuses on conditions likely to affect the sign of the relationship among self-efficacy, goals, and performance. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Two studies examining the negative effect of self-efficacy on performance.

Although hundreds of studies have found a positive relationship between self-efficacy and performance, several studies have found a negative relationship when the analysis is done across time (repeated measures) rather than across individuals. W. T. Powers (1991) predicted this negative relationship based on perceptual control theory. Here, 2 studies are presented to (a) confirm the causal role of self-efficacy and (b) substantiate the explanation. In Study 1, self-efficacy was manipulated for 43 of 87 undergraduates on an analytic game. The manipulation was negatively related to performance on the next trial. In Study 2, 104 undergraduates played the analytic game and reported self-efficacy between each game and confidence in the degree to which they had assessed previous feedback. As expected, self-efficacy led to overconfidence and hence increased the likelihood of committing logic errors during the game. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Self-efficacy and resource allocation: Support for a nonmonotonic, discontinuous model.

Self-regulation theories are paving the way to integrating motivational theories of behavior. However, a review of the motivation literature reveals several possible relationships between self-efficacy and motivation. Past findings were reduced to 4 empirical models, which were compared within a single study using undergraduates playing a computer task. The effects of 2 manipulations of self-efficacy on resource allocation decisions were assessed. Consistent with a multiple goal process conceptualization, self-efficacy was found to relate positively to directing resources toward a goal but negatively to the magnitude of resources allocated for accepted goals. Differences in methods are used to reconcile current and past findings. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Multilevel analysis of organizational goal congruence.

Hierarchical linear modeling was applied to data from 298 school principals and 11,633 teachers to examine the relationships between variables at 2 levels of analysis. J. B. Vancouver and N. W. Schmitt (see record 1991-31872-001) found relationships between individuals' attitudes and their organizational goal congruence. Organizational goal congruence is the agreement between an individual and members of key constituencies within the individual's organization, namely, peers and the supervisor. Using a subset of Vancouver and Schmitt's data, the associations of constituency-level organizational goal congruence with individual attitudes and with the strength of the relationship between individual-level organizational goal congruence and attitude were examined. The results confirmed many of the hypotheses and indicated the merit of using multilevel analytic techniques. The discussion focuses on issues related to levels of analysis and the use of hierarchical linear modeling to study organizational goal congruence. (PsycINFO Database Record (c) 2010 APA, all rights reserved)