To illuminate individual differences in the development of attention-deficit hyperactivity disorder (ADHD) symptoms in the general population, psychometric measures are needed that can capture general population-level symptom variation reliably, validly, and comparably from childhood through to the transition to adulthood. The ADHD subscale of the…

The Transtheoretical Model (TTM) conceptualizes change as a process with five identifiable stages. Each stage has psychological characteristics that are manifestations of an underlying continuum of change. Surprisingly few studies have applied the TTM to understand the process involved with academic development. The objective of this study was to…

The satisfaction of adolescents' perceived psychological needs facilitates their academic achievement and adjustment within school. A first step in this direction is the identification of adolescents' psychological needs and the environmental factors to meet these needs. Based on the theory of Existence, Relatedness, and Growth, known as ERG, the…

The character strengths and virtues approach is a classification system to examine the characteristics of good character in terms of twenty-four strengths and six virtues. This study was designed to investigate the psychometric properties regarding the reliability and validity of the Turkish version of the VIA-Youth. A tool developed to evaluate…

Understanding human motivation requires gauging individuals' strivings to be effective in controlling goal pursuits and establishing the truth about themselves and their experiences. Two constructs, assessment and locomotion, capture well truth and control strivings, respectively. The validation process of the instruments measuring assessment and…