Test theory without an answer key

A general model is presented for homogeneous, dichotomous items when the answer key is not known a priori. The model is structurally related to the two-class latent structure model with the roles of respondents and items interchanged. For very small sets of respondents, iterative maximum likelihood estimates of the parameters can be obtained by existing methods. For other situations, new estimation methods are developed and assessed with Monte Carlo data. The answer key can be accurately reconstructed with relatively small sets of respondents. The model is useful when a researcher wants to study objectively the knowledge possessed by members of a culturally coherent group that the researcher is not a member of.This research was supported by NSF Grant No. SES-8320173 to the authors. We gratefully acknowledge comments and suggestions from John Boyd, Tarow Indow, and Kathy Maher as well as the editor and several anonymous referees.     

Continuous and discrete latent structure models for item response data

Relations are examined between latent trait and latent class models for item response data. Conditions are given for the two-latent class and two-parameter normal ogive models to agree, and relations between their item parameters are presented. Generalizationss are then made to continuous models with more than one latent trait and discrete models with more than two latent classes, and methods are presented for relating latent class models to factor models for dichotomized variables. Results are illustrated using data from the Law School Admission Test, previously analyzed by several authors.     

The polyserial correlation coefficient

The polyserial and point polyserial correlations are discussed as generalizations of the biserial and point biserial correlations. The relationship between the polyserial and point polyserial correlation is derived. The maximum likelihood estimator of the polyserial correlation is compared with a two-step estimator and with a computationally convenient ad hoc estimator. All three estimators perform reasonably well in a Monte Carlo simulation. Some practical applications of the polyserial correlation are described.By coincidence, the first author and the second and third authors learned that they were working independently on closely related problems and, consequently, decided to write a jointly authored paper.     

An all‐or‐nothing thinking turns into darkness: Relations between dichotomous thinking and personality disorders1

Dichotomous thinking is an individual's propensity to think in terms of binary opposition. While this thinking style may be useful for quick decision‐making, some clinical psychologists have indicated that such a style is related to personality disorders. Oshio (2009 ) revealed that the Dichotomous Thinking Inventory (DTI) has significant positive correlations with borderline personality and narcissism. This study examines whether dichotomous thinking is associated with cluster A, B, and C personality disorders. The participants comprised 152 Japanese undergraduates (84 male and 68 female). They completed the DTI and Ten Personality Styles scale (10 PesT; Nakazawa (2006 )), developed from the definitions of personality disorders in the DSM‐IV. Structural equation modeling supported the hierarchical factor structure of personality disorders. The dichotomous thinking effects “cluster” level of disorders more than other levels. The results indicated that thinking dichotomously may lead to wide‐ranging personality disorders.     

Face‐Off: Facial Features and Strategic Choice

I study experimentally a single‐shot trust game where players have the opportunity to choose an avatar—a computer‐generated face—to represent them. These avatars vary on several dimensions—trustworthiness, dominance, and threat—identified by previous work as influencing perceptions of those who view the faces (Todorov, Said, Engell, & Oosterhof, 2008). I take this previous work and ask whether subjects choose faces that are ex ante more trustworthy, whether selected avatars have an influence on strategy choices, and whether individuals who evaluate faces as more trustworthy are also more likely to trust others. Results indicate affirmative answers to all three questions. Additional experimental sessions used randomly assigned avatars. This design allows me to compare behavior when everyone knows avatars are self‐selected versus when everyone knows they are randomly assigned. Random assignment eliminated all three effects observed when subjects chose their avatars.     

Passion,vitality and life satisfaction for physically active old adults

In Arabic world, few studies are interested in psychological factors influencing the physically active old adults. The specific goals of the present research are the following: (i) test the factor structure and invariance tests for gender and physical activities for the Arabic version of the passion scale; (ii) test a model that describes a mediator role of subjective vitality in the relationships between passion and life satisfaction (iii) test the presence of differences for gender, physical activity practice, education level and age on passion. Two studies were conducted with 551 physically active Egyptian old adult (n = 354; n = 197). Passion, Subjective vitality and Life Satisfaction scales were administered. Passion scale composed of two subscales (harmonious and obsessive). Strong support for the complete invariance between groups. Subjective vitality was a mediator in the relationships between harmonious passion and life satisfaction. Education level and age had an effect on passion subscales.     

Shyness,Loneliness Avoidance,and Internet Addiction: What are the Relationships?

Given that shyness has been consistently linked to Internet addiction in youth, an examination into the mediating effect of a desire to avoid loneliness on the shyness–Internet addiction link could offer potential insights into a possible explanatory mechanism as well as directions for Internet addiction prevention and intervention in young adulthood. Thus, the aim of this study is to investigate the mediating role of loneliness avoidance in the relationship between shyness and Internet addiction among 286 youth Internet users. Shyness was significantly and positively correlated with loneliness avoidance and Internet addiction. In addition, loneliness avoidance was significantly and positively correlated with Internet addiction. Most importantly, loneliness avoidance may predispose shy youth to become addicted to the Internet. Theoretical and practical implications of the research findings for youth wellness are addressed in this study.     

Does mediator use contribute to the spacing effect for cued recall? Critical tests of the mediator hypothesis

When study is spaced across sessions (versus massed within a single session), final performance is greater after spacing. This spacing effect may have multiple causes, and according to the mediator hypothesis, part of the effect can be explained by the use of mediator-based strategies. This hypothesis proposes that when study is spaced across sessions, rather than massed within a session, more mediators will be generated that are longer lasting and hence more mediators will be available to support criterion recall. In two experiments, participants were randomly assigned to study paired associates using either a spaced or massed schedule. They reported strategy use for each item during study trials and during the final test. Consistent with the mediator hypothesis, participants who had spaced (as compared to massed) practice reported using more mediators on the final test. This use of effective mediators also statistically accounted for some – but not all of – the spacing effect on final performance.     

童年中期同伴关系与孤独感的中介变量检验

以571名小学三、四、五、六年级的儿童为被试,考察了儿童社会喜好、友谊质量、社交自我知觉与孤独感的关系,检验了社交自我知觉在同伴关系变量与孤独感间的中介作用。结果表明,社会喜好、友谊质量、社交自我知觉和孤独感间相关显著,并且存在显著的性别差异;社交自我知觉在同伴关系变量与孤独感间存在中介的作用;独立的中介效应检验中,社会喜好、友谊质量均通过社交自我知觉的中介作用与孤独感发生联系,同时,也存在直接的联系;综合模型中,社会喜好只通过社交自我知觉的中介作用与孤独感产生联系,不存在直接效应,而友谊质量与孤独感既存在中介的联系,同时也存在直接联系。     

初中生英语学业成绩影响因素的因果模型

采用英语自我效能、英语学习焦虑、英语学习策略问卷,测量研究213名初中生英语自我效能、英语学习焦虑、英语学习策略与英语学业成绩之因果关系模型。结果表明：（1）初中女生英语学习焦虑显著低于男生;（2）初中生性别、自我效能、活用策略对英语学业成绩有显著回归效应,自我效能是性别影响英语学业成绩的中介变量;（3）初中生英语自我效能与学习策略构成因果-反馈关系且对英语学业成绩有显著回归效应;（4）初中生英语自我效能是英语学习焦虑对英语学业成绩产生消极效应的中介变量．并与英语学习焦虑构成因果-反馈关系;（5）初中生英语学习策略与英语自我效能共同对英语学习焦虑构成多级链式因果-反馈关系。