不同时相日光下颜色的恒常性

一、前言 在光源光谱成份改变的条件下,我们周围物体的颜色在眼睛看来保持相对不变,称为颜色恒常性。1807年Thomas Young首先描述了颜色恒常性现象,他指出室内不管是由蜡烛的黄光或火焰的红光来照明的,书页纸仍然看来是白色的。Young认为,外界某一表面的颜色外观,并不完全决定于网膜的红、绿、蓝三种感受器的吸收特性,而也依赖于周围其它物体射入眼睛的光通量。此后,E.Hering对颜色恒常性做了实验表演。一般认为颜色恒常性是对环境照明感受性的降低。视觉通道只传递由物体表面所反射的光谱成     

Personality assessment of the prelingual, profoundly deaf child or adolescent

Personality assessment of children and adolescents experiencing an early, profound hearing loss is hampered by the lack of instruments standardized and/or developed primarily for use with deaf clients. Further compounding the problem are the relatively few psychologists trained in and/or experienced with deaf personality assessment. This article reviews the rudimentary requirements for personality assessment with the deaf and critiques the available personality tests that are either used or useable in assessing the deaf.     

A Review of “Trauma and Human Existence: Autobiographical,Psychoanalytic and Philosophical Reflections”

Abstract

The author sets out to locate Bion's model of the mind within the developmental history of psychoanalysis, from Freud to Klein to Bion, using biographical material and clinical case examples, to illustrate Bion's concepts of container/contained, his understanding and use of projective identification, his extension of the use of the countertransference, and his differentiation between the psychotic and non-psychotic aspects of the mind. Links, and attacks against linking are discussed, as well as Bion's thoughts about learning versus knowing, being versus becoming and his emphasis on the essential importance of the development of the capacity to think.     

Examining the Relationship Between Mathematics Anxiety and Mathematics Performance: An Instructional Hierarchy Perspective

This study investigated the relationship between mathematics anxiety, fluency, and error rates in basic mathematical operations among college students. College students were assigned to one of two groups (high anxiety or low anxiety) based on results from the Fennema-Sherman Mathematics Anxiety Scale (FSMAS). Both groups were then presented with timed tests in basic mathematical operations (addition, subtraction, multiplication, division, and linear equations). Results suggested that the higher mathematics anxiety group had significantly lower fluency levels across all mathematical operations tests. However, there were no significant differences in error rates between the two groups across any of the probes suggesting that mathematics anxiety is more related to higher levels of learning than to the initial acquisition stage of learning. Discussion focuses on a) stages of learning and their potential relationship to mathematics anxiety, b) the relationship between mathematics anxiety and mathematics performance, and c) directions for future research.     

Adolescents' self-esteem measured as a specific score on the Strong-Campbell Interest Inventory

Scores on the "Your Characteristics" section of the Strong-Campbell Interest Inventory (SCII) of 178 high school students (80 boys, 98 girls) were analyzed to determine if what we know about adolescents' self-esteem will predict scores. These adolescents obtained means similar to those of average adults. Implications for counselors are noted.     

Effects of Interspersing Rate on Student Preferences for Mathematics Assignments

This study investigated the extent to which interspersing effects are consistent with the effects of reinforcement on predicting students preferences for mathematics assignments. Students were exposed to 4 pairs of assignments. Each assignment pair contained a control assignment with 15 problems requiring multiplication of a three digit number by a two digit number, and an experimental assignment consisting of 15 similar multiplication problems plus additional brief one-digit by one-digit multiplication problems interspersed at four different rates (i.e., no interspersing, every other, every third, or every fifth problem) across assignment pairs. Performance data were collected for accuracy, total problem completion rate and target problem completion rate. In addition to performance data, students were asked to rate each assignment with regard to relative difficulty, time, effort to complete, and preference between assignments for homework. Results suggest that although interspersing rates do not affect accuracy, they do affect problem completion rate, and student preferences for academic assignments. Discussion focuses on interspersing rate and schedules of reinforcement with emphasis on both applied and theoretical implications.     

Effects of Interspersing Additional Brief Math Problems on Student Performance and Perception of Math Assignments: Getting Students to Prefer to Do More Work

Three experiments were conducted to assess the effects of the interspersing procedure on students' mathematics performance, perceptions of mathematics assignments, and preference for mathematics assignments when more work was added. In Experiment I, college students worked computation problems from two assignments. The control assignment contained 15 three-digit by two-digit problems (3 × 2) and the experimental assignments contained 18 3 × 2 problems and 6 additional interspersed one-digit by one-digit problems (1 × 1). Students then rated the assignments and chose one for homework. Results showed significantly more students preferred (i.e., chose it for homework) the experimental assignment with the additional target (i.e., 3 × 2) and interspersed problems. Furthermore, significantly more students rated this experiment as requiring less effort and being less difficult. Moreover, students' mathematics performance was not affected by the procedure. Experiment II strengthened the internal validity by showing that students did not prefer the experimental assignment because it contained more target problems. Experiment III showed that the interspersing procedure was not powerful enough to extend findings beyond the 20% level (i.e., 40 and 60% more conditions). Results showed how the interspersing procedure could be used to encourage students to choose to do more target computation tasks. Discussion focuses on the applied value of the interspersing procedure and plausible causal mechanisms that may account for current and past findings related to student choice and interspersing brief tasks.     

Comparing Multicultural With General Counseling Knowledge and Skill Competency for Students Who Completed Counselor Training

This study evaluates the effectiveness of a counselor education program in teaching multicultural counseling knowledge and skills. Standardized examination scores and rater evaluations compare multicultural with general counseling knowledge and skill competency for students who completed a counseling master's program. The relationship between multicultural knowledge and multicultural and general skills is examined. Este estudio evalúa la efectividad de un programa educativo para consejeros a la hora de enseñar conocimientos y habilidades multiculturales en consejería. Se emplean tanto resultados estandarizados de exámenes como evaluaciones docentes para comparar los conocimientos de consejeria y la competencia en habilidades de tipo general con los multiculturales en estudiantes que han completado un Máster en Consejería. Se examina la relación entre conocimientos multiculturales y habilidades generales y multiculturales.