The perceptual recognition of objects is conceptualized to be a process in which the image of the input is segmented at regions of deep concavity into an arrangement of simple geometric components, such as blocks, cylinders, wedges, and cones. The fundamental assumption of the proposed theory, recognition-by-components (RBC), is that a modest set of generalized-cone components, called geons (N £ 36), can be derived from contrasts of five readily detectable properties of edges in a two-dimensiona l image: curvature, collinearity, symmetry, parallelism, and cotermination. The detection of these properties is generally invariant over viewing position an$ image quality and consequently allows robust object perception when the image is projected from a novel viewpoint or is degraded. RBC thus provides a principled account of the heretofore undecided relation between the classic principles of perceptual organization and pattern recognition: The constraints toward regularization (Pragnanz) characterize not the complete object but the object's components. Representational power derives from an allowance of free combinations of the geons. A Principle of Componential Recovery can account for the major phenomena of object recognition: If an arrangement of two or three geons can be recovered from the input, objects can be quickly recognized even when they are occluded, novel, rotated in depth, or extensively degraded. The results from experiments on the perception of briefly presented pictures by human observers provide empirical support for the theory. Any single object can project an infinity of image configurations to the retina. The orientation of the object to the viewer can vary continuously, each giving rise to a different two-dimensional projection. The object can be occluded by other objects or texture fields, as when viewed behind foliage. The object need not be presented as a full-colored textured image but instead can be a simplified line drawing. Moreover, the object can even be missing some of its parts or be a novel exemplar of its particular category. But it is only with rare exceptions that an image fails to be rapidly and readily classified, either as an instance of a familiar object category or as an instance that cannot be so classified (itself a form of classification).

/pdf/recognition-by-components-a-theory-of-human-image-2d038hmxno.pdf

Recognition-by-Components: A Theory of Human Image Understanding.

: A review of both laboratory and field studies on the effect of setting goals when learning or performing a task found that specific, challenging goals led more often to higher performance than easy goals, 'do your best' goals or no goals. This is one of the most robust and replicable findings in the psychological literature, with 90% of the studies showing positive or partially positive results. The main mechanisms by which goals affect performance are by directing attention, mobilizing effort, increasing persistence, and motivating strategy development. Goal setting is most likely to improve task performance when the goals are specific and sufficiently challenging, when the subjects have sufficient ability (and ability differences are controlled), when feedback is provided to show progress in relation to the goal, when rewards such as money are given for goal attainment, when the exerimenter manager is supportive, and when the assigned goals are actually accepted by the individual. No reliable individual differences have emerged in goal setting studies, probably because goals were typically assigned rather than self-set. Need for achievement and self esteem may be the most promising individual difference variables. (Author)

https://psycnet.apa.org/doi/10.1037/0033-2909.90.1.125

Goal setting and task performance: 1969–1980.

Research on employee turnover since the Porter and Steers analysis of the literature reveals that age, tenure, overall satisfaction, job content, intentions to remain on the job, and commitment are consistently and negatively related to turnover. Generally, however, less than 20% of the variance in turnover is explained. Lack of a clear conceptual model, failure to consider available job alternatives, insufficient multivariate research, and infrequent longitudinal studies are identified as factors precluding a better understanding of the psychology of the employee turnover process. A conceptual model is presented that suggests a need to distinguish between satisfaction (present oriented) and attraction/expected utility (future oriented) for both the present role and alternative roles, a need to consider nonwork values and nonwork consequences of turnover behavior as well as contractual constraints, and a potential mechanism for integrating aggregate-level research findings into an individual-le vel model of the turnover process. Employee withdrawal, in the form of turnover, has sustained the interest of personnel researchers, behavioral scientists, and management practitioners. At the macro level, economists and personnel researchers have demonstrated the relationship between turnover rates and the aggregate level of economic activity, employment levels, and vacancy levels (see, e.g., Armknecht & Early, 1972; Forrest, Cummings, & Johnson, 1977; Price, 1977; Woodward, 1975-1976). At the micro level, behavioral research has established a consistent, although generally weak, correlation between job dissatisfaction and turnover (Brayfield & Crockett, 19SS; Locke, 1976; Porter & Steers, 1973; Vroom, 1964; Herzberg, Mausner, Peterson, & Capwell,

Review and Conceptual Analysis of the Employee Turnover Process

The statistical literature on tests to compare treatments after the analysis of variance is reviewed, and the use of these tests in ecology is examined. Monte Carlo simulations on normal and lognormal data indicate that many of the tests commonly used are inappropriate or inefficient. Particular tests are recommended for unplanned multiple comparisons on the basis of controlling experimentwise type I error rate and providing maximum power. These include tests for parametric and nonparametric cases, equal and unequal sample sizes, homogeneous and heterogeneous variances, non-independent means (repeated measures or adjusted means), and comparing treatments to a control. Formulae and a worked example are provided. The problem of violations of assumptions, especially variance heterogeneity, was investigated using simulations, and particular strategies are recommended. The advantages and use of planned comparisons in ecology are discussed, and the philosophy of hypothesis testing with unplanned multiple comparisons is consid- ered in relation to confidence intervals and statistical estimation.

https://www.fc.up.pt/pessoas/amsantos/support/dayquin1989.pdf

Comparisons of Treatments After an Analysis of Variance in Ecology

The contextual factors of entrepreneurship consist of social, political, and economic variables such as displacement, changes in markets, and government deregulation (Bird, 1988). Entrepreneurial i...

The Influence of Self-Efficacy on the Development of Entrepreneurial Intentions and Actions:

Multiple comparison in psychological research.

Speed of perception as a function of mode of representation.

Intentional behavior; an approach to human motivation , Intentional behavior; an approach to human motivation , کتابخانه دیجیتال و فن آوری اطلاعات دانشگاه امام صادق(ع)

Intentional behavior; an approach to human motivation

Adaptive behavioural flexibility in dynamic environments is well supported (Taff & Vitousek, 2016). Although behavioural responses are often assumed to be mediated by physiological processes, our knowledge about the underlying physiological mechanisms is limited (Crossin, Love, Cooke, & Williams, 2016; Taff & Vitousek, 2016). Hormonal systems, which respond to environmental, inter‐ nal and social conditions, are important mediators of phenotypic flexibility and life‐history trade‐offs (Taff & Vitousek, 2016; Zera & Harshman, 2001). Glucocorticoid hormones may be particu‐ larly central mediators of life‐history trade‐offs due to their role in Received: 19 March 2018 | Accepted: 5 December 2018 DOI: 10.1111/1365-2435.13281

https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2435.13281

Thomas A. Ryan

Papers

Multiple comparison in psychological research.

Speed of perception as a function of mode of representation.

Intentional behavior; an approach to human motivation

On again, off again: Acute stress response and negative feedback together predict resilience to experimental challenges

The experiment as the unit for computing rates of error.