- Käppler, Karl Christoph, Universidade de Educação de Ludwigsburg
- Karai, Virág, Department of General Psychology, Károli Gáspár University of the Reformed Church, Budapest, Hungary
- Karandashev, Victor, Aquinas College
- Karandashev, Victor, Department of Psychology and Counselor Education, Aquinas College, East Grand Rapids, MI, USA
- Kartolo, Arief B., Department of Psychology, University of Windsor, Windsor, ON, Canada
- Kato, Kazuo, Kyushu University
- Kennair, Leif Edward Ottesen, Norwegian University of Science and Technology
- Kent, Erin, Eastern Washington University
- Kheong, Megan, Department of Psychology, University of Calgary, Calgary, Canada
- Khetrapal, Neha, Eindhoven University of Technology
- Khodarahimi, Siamak, Eghlid Branch, Islamic Azad University, Tehran
- Khoury, Careen, Department of Psychology, University of Calgary, Calgary, Canada
- Kidd, Billy, Walden University
- Kiling, Indra Yohanes, Department of Psychology, University of Nusa Cendana, Kupang, Indonesia
- Kim, Junhyoung, Winston Salem State University
- Kordoutis, Panos, Department of Psychology, Panteion University of Social and Political Sciences, Athens, Greece
- Kordoutis, Panos S., Panteion University of Social and Political Sciences, Athens
- Kovács, Dóra, Department of General Psychology, Károli Gáspár University of the Reformed Church, Budapest, Hungary
- Kovács, Dora Csilla, Department of General Psychology, Károli Gáspár University of the Reformed Church, Budapest, Hungary
- Kövi, Zsuzsanna, Department of General Psychology, Károli Gáspár University of the Reformed Church, Budapest, Hungary
- Kulig, Barbara, Department of Clinical Psychology, Semmelweis University, Budapest, Hungary
- Kurz da Cunha, Gabriela, Health and Behavior Post-Graduate Program, Catholic University of Pelotas, Pelotas, Brazil
- Kwantes, Catherine T., Department of Psychology, University of Windsor, Windsor, ON, Canada
- Lachance-Grzela, Mylène, Université de Moncton, Moncton
- LaCross, Dallas, Department of Psychology, Oakland University, Rochester, MI, USA