Identify the gaps and develop a research question for these five articles?

Identify a gap in abnormal psychology research and begin to develop a basic research question to address the identified gap. Here are the (5) articles to develop the research question and find a gap

1. Simply Psychology

2. Psychological Disorder: What Makes a Behavior Abnormal 

3.Cognitive processing therapy for veterans with PSTD: A comparison between outpatient and residential treatment.

4.Stressful life events in Bipolar I and Bipolar II Disorders: Cause or Consequence of mood symptoms? 

5. The Efficacy and Effectiveness of Psychological Treatments for Mood, Anxiety and Related Disorders.