Three studies sought to determine whether incubation effects could be reliably generated in a problem-solving task. Experimental variables manipulated were the duration of the interval between two problem-solving opportunities and the activity performed by the problem solvers during the interval. A multisolution anagram task was used which…

Undergraduates studied nonword exemplars and then created their own novel nonwords. In Experiment 1, people studied legal or illegal nonwords. In Experiment 2, people studied illegal nonwords, but to increase awareness of the features, half of the participants assessed the features of the nonwords. Despite instructions to avoid copying any aspect…

This study is intended to develop an assessment instrument to investigate students' understandings about internal transport in plants and human circulatory system. A refined process of a two-tier diagnostic test was used to develop the instrument. Finally, three versions of the Internal Transport in Plants and the Human Circulatory System test…

This paper describes an exercise that frames the choices made in creating measures of knowledge as problematic--making clear that the difficulties in interpreting the survey response are not limited to opinion items but apply to questions about factual information as well. Ambiguities in question wording and response options can invite multiple…

Science and religion both describe the way things are, and both refer to the source of authority behind 'truth'. Personal beliefs about science and religion can affect attitudes towards science and the learning of science. This paper reports the results of two exploratory studies: a qualitative study and a quantitative survey study on the…

Results from the 2000 Organization for Economic Cooperation and Development (OECD) Programme for International Assessment (PISA) indicated that inequalities in performance associated with students' family background were relatively large in Switzerland compared to other participating countries. The study upon which this article is based examines…

For comparing nested covariance structure models, the standard procedure is the likelihood ratio test of the difference in fit, where the null hypothesis is that the models fit identically in the population. A procedure for determining statistical power of this test is presented where effect size is based on a specified difference in overall fit…

To deal with nonnormal and heterogeneous data for the one-way fixed effect analysis of variance model, the authors adopted a trimmed means method in conjunction with Hall's invertible transformation into a heteroscedastic test statistic (Alexander-Govern test or Welch test). The results of simulation experiments showed that the proposed technique…

The purpose of the study was to test the classification system for career decision difficulties of college students in a Chinese culture. Five hundred twenty-one college students completed the Chinese version of the Career Decision-Making Difficulties Questionnaire. Data obtained were analyzed by multivariate analysis of variance, factor analysis,…

Multilevel modeling allows for the simultaneous analysis of data gathered at more than 1 unit of analysis (e.g., children nested in schools). It is often used to examine the effects of various contexts on individual differences in change. This paper promotes the application of multilevel models to longitudinal dyadic data in family research. By…

Introduction: Stress in Spanish is associated with an orthographic mark that indicates stress, but there are also other clues that point to it. Most words have the same stress (on the penultimate syllable), and closed syllables (syllables ending in a consonant) attract the stress. In this paper we study these clues, and consequently the function…

Fifty-two women with Stage I and Stage II breast cancer agreed to participate in a study to determine the effectiveness of two interventions, guided imagery and relaxation, to enhance psychological well-being. Participants were randomly assigned to either a guided imagery or relaxation group. Forty women completed the study. A student's t-test was…

In the predictive learning and causal reasoning literature it has been suggested that the processing of events is under the control of a competitive mechanism. However, little is known about whether the competitive mechanism operates at the encoding or near the response stages. The present work suggests that measures based on the recall of…

This quantitative study examines the influence of service-learning on levels of intercultural sensitivity of international school students in Hong Kong using the Intercultural Development Inventory (IDI). IDI scores are found to correlate with a variety of demographic variables and variables related to four models of service programs. One…

In two experiments, the time course of the expression of fear in trace (hippocampus-dependent) versus delay (hippocampus-independent) conditioning was characterized with a high degree of temporal specificity using fear-potentiated startle. In experiment 1, groups of rats were given delay fear conditioning or trace fear conditioning with a 3- or…