Leifur Geir Hafsteinsson

Adolescents’ Perceived Parenting Styles and Their Substance Use: Concurrent and Longitudinal Analyses

Sigrún Aðalbjarnardóttir, Leifur Geir Hafsteinsson · Journal of Research on Adolescence · 2001 · 172 citations

Substance Use, Adolescent Behavioral Health, Education +21

The Impact of Goal‐Performance Discrepancies, Self‐Efficacy, and Goal Orientation on Upward Goal Revision¹

John J. Donovan, Leifur Geir Hafsteinsson · Journal of Applied Social Psychology · 2006 · 44 citations · Full text

Icelandic Job Applicants, Job Performance, Education +16

Applicants' Self‐presentational Behavior across Cultures: Less self‐presentation in <scp>S</scp>witzerland and <scp>I</scp>celand than in the <scp>U</scp>nited <scp>S</scp>tates

Cornelius J. König, Leifur Geir Hafsteinsson, Anne Jansen et al. · International Journal of Selection and Assessment · 2011 · 35 citations

Social Psychology, Self‐presentational Behavior, Social Influence +25

An Item Response Theory Examination of Two Popular Goal Orientation Measures

Leifur Geir Hafsteinsson, John J. Donovan, B. Tyson Breland · Educational and Psychological Measurement · 2007 · 29 citations

Goal Orientation Construct, Quality Of Life, Student Motivation +15

The interactive effects of achievement goals and task complexity on enjoyment, mental focus, and effort

John J. Donovan, Leifur Geir Hafsteinsson, Steven J. Lorenzet · Journal of Applied Social Psychology · 2018 · 11 citations

Independent Task Completion, Educational Psychology, Education +23