Contents of It's not All in Your Head by Asmundson and Taylor

up (Taylor et al., 2005). BSM may also be especially useful for individuals with
comorbid disorders that are aggravated by stress. More research is needed to determine if
BSM is as efficacious as CBT and to distinguish the clinically important components that
are common to both therapies.
The efficacy of treatments for health anxiety (e.g., psychoeducation, cognitive
therapy, behavioural therapy, ERP, CBT, and BSM) has been compared in many studies
(e.g., Avia et al., 1996; Bouman & Visser, 1998; Clark et al., 1998; Fava, Grandi,
Rafanelli, Fabbri, & Cazzaro, 2000; Lidbeck, 1997; Speckens et al., 1995; Stern &
Fernandez, 1991; Visser & Bouman, 2001; Warwick et al., 1996). In these studies, effect
sizes of treatments were calculated based on participants‘ scores on global measures of
health anxiety, anxiety, and depression (e.g., WI, Beck Anxiety Inventory [BAI], Beck
Depression Inventory [BDI]) and have been expressed as Cohen‘s d statistic (1998). A
small effect size or d is 0.20, a medium effect size is 0.50, and large effect size is 0.80 or
higher (Cohen, 1988). Most of the treatments examined were 6 to 21weeks in duration
and had small sample sizes (6 – 79 participants). In these studies, more participants
tended to drop out of the psychosocial treatment groups (2% - 13%) compared to the
control groups (0 %).
Psychosocial treatments (e.g., Avia et al., 1996; Bouman & Visser, 1998; Clark et
al., 1998; Fava et al., 2000; Lidbeck, 1997; Sorensen et al., 2010; Speckens et al., 1995;
Stern & Fernandez, 1991; Visser & Bouman, 2001; Warwick et al., 1996) appear to be
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