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    Starting points' effects on risk-taking behavior

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    We formally represent the effects of prior gains and losses in a simple dynamic preference calculus based on prospect theory's value function and thoughts adapted from aspiration level theories. We investigate our predictions in questionnaire experiments. Since we document a strong effect of prior gains and losses in our main study on entrepreneurial decision making, findings are consistent with a difference between the actual status quo and temporarily invariant aspiration levels. However, the general level of willingness to pay (WTP), differences between gain and loss domains, and preference orders within the gain domain are inconsistent with prospect theory's prediction. In the loss domain, results are less straightforward but only interpretable on the joint basis of prospect theory, starting point formula, and an additional survival point. Altogether, results are a challenge to prescriptive as well as descriptive models of decision making relying on context-independent value functions. Implications for a further development of descriptive decision theoretic models based on aspiration levels to account for dynamic starting points effects are discussed

    Science in the Elementary and Middle School: Earth and Space Science Starting Points

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    This chapter focuses on students' alternative conceptions of science that create a barrier to learning concepts in Earth and space science. Using specific examples of basic content and concepts addressing elementary and middle school, a strategy for identifying and addressing alternative conceptions is demonstrated. Examples of discrepant event activities and learning cycle lesson plans are provided. These discussions provide a foundation for teachers who wish to effectively plan lessons that assist students in their learning of Earth and space science concepts. Educational levels: Graduate or professional

    Biomechanical evaluation of the push-up exercise of the upper extremities from various starting points

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    The purpose of the present research was to evaluate the push-up exercise of the upper extremities in respect of biomechanics, to compare the muscle function, while changing the position of performance and to examine the torso's inclination during the exercise. The result is that the activation of the muscles, apart from the triceps brachii muscle, does not differentiate significantly in any of the positions. Moreover, the elevating the hands above the feet position is not recommended in protocols where the aim is to improve the muscle force because it displays the lowest mean value of vertical force and a low RFD. On the other hand, the standard push-up position is considered to be the most appropriate when the aim is to improve the triceps brachii muscle's force because it displays the highest RFD and the highest activation of this muscle. Finally, the correct body position during this exercise prevents from incorrect and damaging inclinations of the torso. © JPES
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