The present study intended to propose a causal model of factors that would predict Oral Communication Apprehension (OCA) of Iranian learners of English as a foreign language. To conduct the study, 135 male and female University students majoring in English were selected. Five variables including: learners’self-esteem and introversion/extroversion(as independent variables), their gender and prof...

We consider testing the main treatment effects and interaction effects in crossed two-way layout when one factor or both factors have large number of levels. Random errors are allowed to be nonnormal and heteroscedastic. In heteroscedastic case, we propose new test statistics. The asymptotic distributions of our test statistics are derived under both the null hypothesis and local alternatives. ...

Introduction: An evaluation of the curriculum elementscan be recognized as a necessity in curriculum dynamic andimprovement. This study aimed at evaluating five main elementsof a physiopathology curriculum in internal medicine (objectives,content, methods, evaluation, and management).Method: The present study is of a descriptive-analytical type, andthe study population consisted of a total of 4...

aim: evidence indicates that demographic factors such as age, gender, and mother's literacy are important predictors of fruit and vegetable consumption among adolescents. so, this study was conducted in order to survey the relation between socio-demographic factors and fruit and vegetable consumption among tehranian adolescents in 2013. methods: this cross-sectional study (descriptive-analytic)...

In this article we consider the Two-Way ANOVA model with unequal cell frequencies without the assumption of equal error variances. By taking the generalized approach to finding p-values, classical F-tests for no interaction effects and equal main effects are extended under heteroscedasticity. The generalized Ftests developed in this article can be utilized in significance testing or in fixed le...