Contents of It's not All in Your Head by Asmundson and Taylor
Contents of It's not All in Your Head by Asmundson and Taylor
Contents of It's not All in Your Head by Asmundson and Taylor
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Independent samples t tests were used to analyze differences between the SHB <strong>and</strong> WLC<br />
groups. Only p values less than .05 were considered statistically significant.<br />
Power analyses were conducted us<strong>in</strong>g the Power <strong>and</strong> Sample Size Calculation<br />
program (Dupont & Plummer, 2009) to determ<strong>in</strong>e if there was sufficient power to justify<br />
conclusions based on the small sample; .80 is commonly used as the m<strong>in</strong>imum acceptable<br />
level <strong>of</strong> power (Cohen, 1988). <strong>All</strong> power analyses were conducted for p = .05, 2-tailed<br />
tests <strong>of</strong> significance. Effect size (Cohen‘s d) was also calculated for each measure us<strong>in</strong>g<br />
the Effect Size Calculator (Becker, 1999); effect sizes were rated as small (d = 0.20),<br />
medium (d = 0.50), <strong>and</strong> large (d = 0.80; Cohen 1988). A cl<strong>in</strong>ically significant treatment is<br />
one that br<strong>in</strong>gs an <strong>in</strong>dividual from the dysfunctional population (i.e., health anxiety<br />
population) <strong>in</strong>to the functional population (Jacobson & Truax, 1991). Results were<br />
assessed for cl<strong>in</strong>ical significance <strong>and</strong> means that were brought with<strong>in</strong> two st<strong>and</strong>ard<br />
deviations (M ± [2 x SD]) <strong>of</strong> the healthy normative sample mean were considered to be<br />
cl<strong>in</strong>ically significant (Jacobson & Truax, 1991). Open-ended questions were analyzed to<br />
identify common themes us<strong>in</strong>g deductive content analysis (Elo & Kyngäs, 2007).<br />
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