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173,519 results
Martin Seligman spricht über Psychologie -- als Forschungsbereich und wie sie bei jedem einzelnen Patienten und jedem ...
1,428,575 views
15 years ago
"What is Positive Psychology?" A "whiteboard animation" sponsored by Test Prep Gurus (www.TestPrepGurus.com) This video ...
760,941 views
11 years ago