Posttraumatic stress disorder (PTSD] following 9/11. Levitt, Malta, Martin, Davis, and Cloitre 12007) evaluated the effectiveness of cogni- tive behavioral therapy (CBT] for treating PTSD and related symptoms for survivors of the 9/11 attacks on the World Trade Center (WTC). They used a pretest-posttest design to see if CBT was successful at reducing the symptoms of PTSD and related symptoms of depression. They used the Modified PTSD Symptom Scale Self-Report (MPSS-SR) questionnaire to measure symptoms of PTSD and the Beck Depression Inventory (BDI] self-report questionnaire to measure symptoms of depression. For both questionnaires, lower scores indicated fewer symptoms. The authors reported the following: Pre-to-post treatments t tests for the WTC sample revealed significant decreases i scores on the MPSS-SR,(t(37) = 12.74, p< .01): as well as on the BDI (t(34) = 7.26, p < .01).(Levitt et al., 2007) p, 1427). Was this a repeated-measures design or a matched-pairs design? Which questionnaire (MPSS-SR or BDI) was completed by more participants? Did the authors find support for their hypothesis? Explain.
Posttraumatic stress disorder (PTSD] following 9/11. Levitt, Malta, Martin, Davis, and Cloitre 12007) evaluated the effectiveness of cogni- tive behavioral therapy (CBT] for treating PTSD and related symptoms for survivors of the 9/11 attacks on the World Trade Center (WTC). They used a pretest-posttest design to see if CBT was successful at reducing the symptoms of PTSD and related symptoms of depression. They used the Modified PTSD Symptom Scale Self-Report (MPSS-SR) questionnaire to measure symptoms of PTSD and the Beck Depression Inventory (BDI] self-report questionnaire to measure symptoms of depression. For both questionnaires, lower scores indicated fewer symptoms. The authors reported the following: Pre-to-post treatments t tests for the WTC sample revealed significant decreases i scores on the MPSS-SR,(t(37) = 12.74, p< .01): as well as on the BDI (t(34) = 7.26, p < .01).(Levitt et al., 2007) p, 1427). Was this a repeated-measures design or a matched-pairs design? Which questionnaire (MPSS-SR or BDI) was completed by more participants? Did the authors find support for their hypothesis? Explain.
MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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Posttraumatic stress disorder (PTSD] following 9/11. Levitt, Malta, Martin, Davis, and Cloitre 12007) evaluated the effectiveness of cogni- tive behavioral therapy (CBT] for treating PTSD and related symptoms for survivors of the 9/11 attacks on the World Trade Center (WTC). They used a pretest-posttest design to see if CBT was successful at reducing the symptoms of PTSD and related symptoms of depression. They used the Modified PTSD Symptom Scale Self-Report (MPSS-SR) questionnaire to measure symptoms of PTSD and the Beck Depression Inventory (BDI] self-report questionnaire to measure symptoms of depression. For both questionnaires, lower scores indicated fewer symptoms. The authors reported the following:
Pre-to-post treatments t tests for the WTC sample revealed significant decreases i scores on the MPSS-SR,(t(37) = 12.74, p< .01): as well as on the BDI (t(34) = 7.26, p < .01).(Levitt et al., 2007) p, 1427).
- Was this a repeated-measures design or a matched-pairs design?
- Which questionnaire (MPSS-SR or BDI) was completed by more participants?
- Did the authors find support for their hypothesis? Explain.
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