A precise method of measuring fixational eccentricity using the Maxwell spot centroid

An improved version of a method which uses the Maxwell spot to measure eccentricity of fixation is described and discussed. The method determines the centroid of the macula psychophysically and locates the position of this centroid with respect to the point the O uses for fixation. The distance between these two points is a measure of eccentricity of fixation. It is estimated that the present method has an instrumental error of about 0.1 deg.     

Preferences for token exchange‐production schedules: Effects of task difficulty and token‐production schedules

Previous research suggests that accumulated exchange‐production schedules promote increased work completion and are more preferred than distributed exchange‐production schedules. The purpose of this study was to evaluate whether the response effort or token‐production schedules associated with token delivery influenced preferences for exchange‐production schedules. Tokens exchanged under accumulated schedules were more preferred, relative to distributed schedules, when tokens were earned for completing easy tasks. When participants earned tokens for completing difficult tasks, two of three participants preferred accumulated exchange‐production schedules (Experiment 1). Under dense token‐production schedules, accumulated exchange‐production schedules were preferred, but participant's preferences switched to distributed schedules under increasing token‐production (i.e., leaner) schedules (Experiment 2).     

Quantum spin hydrodynamics and a new spin-current mode in ferromagnetic metals

We derive the quantum spin hydrodynamic equations in a ferromagnetic metal. From these equations we show the existence of a new massive spin-current mode. This mode can be observed in neutron scattering experiments and we discuss the difficulties in seeing it. At the end we discuss the existence of this mode in localized ferromagnets.     

Message framing and sunscreen use: gain-framed messages motivate beach-goers.

Prospect theory suggests that people respond differentially to factually equivalent messages depending on how these messages are framed (A. Tversky & D. Kahneman, 1981). A. J. Rothman and P. Salovey (1997) relied on prospect theory to predict that messages highlighting potential "gains" should promote prevention behaviors such as sunscreen use best. This experiment compared the effectiveness of 4 differently framed messages (2 highlighting gains, 2 highlighting losses) to persuade 217 beach-goers to obtain and use sunscreen. Attitudes and intentions were measured before and immediately following the delivery of the framed information, and after completing the questionnaire participants were given a coupon redeemable for a small bottle of sunscreen later that same day. People who read either of the 2 gain-framed brochures, compared with those who read either of the 2 loss-framed brochures, were significantly more likely to (a) request sunscreen, (b) intend to repeatedly apply sunscreen while at the beach, and (c) intend to use sunscreen with a sun protection factor of 15 or higher.     

Patient Perspectives on Medical Trauma Related to Inflammatory Bowel Disease

Journal of Clinical Psychology in Medical Settings - Post-traumatic stress symptoms (PTSS) in response to medical trauma are understudied in inflammatory bowel disease (IBD). Two studies identify...     

Should President Clinton be prosecuted for perjury? The effects of preference for consistency, self-esteem, and political party affiliation

Conducted in the fall of 2000, this study investigates personality and social variables that should predict attitudes regarding the desirability of prosecuting President Clinton for perjury following the expiration of his term (in January of 2001). Prosecution was favored by High Preference for Consistency (PFC) more than Low PFC individuals, by High Self-Esteem more than Low Self-Esteem individuals, and by Republicans more than Democrats. In addition, PFC and Party Affiliation interacted: High PFCs wanted Clinton prosecuted regardless of Party Affiliation, but Low PFCs desired prosecution strongly only if they were Republicans. Overall, the results are consistent with the general self-theory principle that human beings tend to adopt attitudes and positions that restore, maintain, or enhance self-esteem.