Single-case experimental studies of a self-help manual for traumatic stress in earthquake survivors.

Studies showed that earthquake-related posttraumatic stress disorder could be reduced by a single session of therapist instructions for self-exposure to fear cues. Eight single-case experimental studies examined whether such instructions were as effective when delivered through a self-help manual after an initial assessment. After two baseline assessments conducted at the participants homes, the manual was delivered to the participants, who were then assessed at week 10 (post-treatment) and at 1-, 3-, and 6-month post-treatment. After minimal improvement during the baseline, treatment achieved marked improvement in seven survivors, leading to effect sizes comparable to those obtained by therapist-delivered treatment. Self-help appears to be a promising approach in cost-effective survivor care.