Presents dynamics and measurements of subjective experience of problem irresolvability (SEPI). First study describes construction and factor analysis of scale and its relationship to suicidal tendencies, hopelessness, depression, anxiety, and commitment to parents. Second study presents factor analysis and association between SEPI scale and suicidal tendencies. Results suggest scale has sound psychometric properties that distinguish suicidal, psychiatric, and normal adolescents. (Author/JDM)