Dimensionality assessment in ordinal data: a comparison between parallel analysis and exploratory graph analysis.

In the social sciences, accurately identifying the dimensionality of measurement scales is crucial for understanding latent constructs such as anxiety, happiness, and self-efficacy. This study presents a rigorous comparison between Parallel Analysis (PA) and Exploratory Graph Analysis (EGA) for assessing the dimensionality of scales, particularly focusing on ordinal data. Through an extensive simulation study, we evaluated the effectiveness of these methods under various conditions, including varying sample size, number of factors and their association, patterns of loading magnitudes, and symmetrical or skewed item distributions with assumed underlying normality or non-normality.

Examination of Student-Teacher Interpersonal Relationships Circumplex Model in the Greek Educational Context.

Student-teacher interpersonal relationships contribute significantly to the academic trajectory and achievement of children and adolescents. The Questionnaire on Teacher Interaction (QTI) is one of the most widely applied measures for assessing students' perceptions about the teachers' interpersonal behaviour. QTI comprises eight subscales that are assumed to follow a circumplex model.

Factorial Validity and Measurement Invariance of the Principal Leadership Questionnaire in Greek Educational Context.

The purpose of this study was to investigate the applicability of the Principal Leadership Questionnaire (PLQ) to Greek educational context and to present the most important aspects describing educational leadership in a centralized educational context. It was sought to examine; a) the factorial structure of PLQ b) its invariance across teachers' levels of education and c) its concurrent validity. Data were collected from 730 Greek primary and secondary school teachers of 77 schools.

Teachers' and children's perceptions about their relationships: examining the construct of dependency in the Greek sociocultural context.

This study examines teachers' and children's perceptions of dependency, and their linkages with other relationship dimensions, in a cultural context with a more collectivistic orientation. Additionally, it examines the factorial validity and reliability of the Greek version of the Child Appraisal of Relationship with Teacher Scale (CARTS) and teacher-child perceptions' convergence of relationship quality. Participants were 348 kindergarten students and 35 teachers from Greek kindergarten classrooms.

Applying Exploratory Structural Equation Modeling to Examine the Student-Teacher Relationship Scale in a Representative Greek Sample.

Teacher-child relationships in early childhood are a fundamental prerequisite for children's social, emotional, and academic development. The Student-Teacher Relationship Scale (STRS) is one of the most widely accepted and used instruments that evaluate the quality of teacher-child relationships. STRS is a 28-item questionnaire that assess three relational dimensions, Closeness, Conflict, and Dependency.