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Direct linkChristou, Konstantinos P.; Vosniadou, Stella – Mathematical Thinking and Learning: An International Journal, 2012
Three experiments used multiple methods--open-ended assessments, multiple-choice questionnaires, and interviews--to investigate the hypothesis that the development of students' understanding of the concept of real variable in algebra may be influenced in fundamental ways by their initial concept of number, which seems to be organized around the…
Descriptors: Numbers, Grade 10, Algebra, Secondary School Students
Mouratidis, Athanasios A.; Vansteenkiste, Maarten; Sideridis, Georgios; Lens, Willy – Journal of Educational Psychology, 2011
In 2 quasi-experimental field studies in a real-life physical education (PE) setting, the authors investigated whether the interest-enjoyment and vitality of Greek pupils (age range, 10-12 years) varied from class to class as a function of the class-to-class variation in the manipulated motivational environment (Studies 1 and 2) and pupils'…
Descriptors: Evidence, Control Groups, Physical Education, Field Studies
