The Life Engagement Test: assessing purpose in life
Journal of Behavioral Medicine (2006) - Comment
pubmed: 16565785  doi: 10.1007/s10865-005-9044-1  issn: 0160-7715  issn: 1573-3521 

Michael F. Scheier, Carsten Wrosch, Andrew Baum, Sheldon Cohen, Lynn M. Martire, Karen A. Matthews, Richard Schulz, Bozena Zdaniuk