Table 2.

Mean US expectancy ratings and significant between-group comparisons during fear acquisition, extinction learning, and extinction recall.

	HC		SAD		PTSD
	M %	SD	M %	SD	M %	SD	t-score	Df	d	95% CI
										Lower	Upper
Fear acquisition
Early
CS+	72	24.06	58.98	25.37	61.24	14.16
CS−	8.33	10.29	26.49	31.03	50.38	28.68	−2.21	18.46	.80	−35.36	−.96	HC < SAD*
							−5.01	14.67	1.95	−59.96	−24.14	HC < PTSD***
							−2.13	27	.80	−46.88	−.90	SAD < PTSD*
Late
CS+	68.17	24.43	61.46	23.05	66.15	14.38
CS−	3.33	6.99	7.67	9.23	40.00	33.22	−3.90	12.92	1.53	−56.97	−16.37	HC < PTSD**
							−3.40	13.61	1.33	−52.81	−11.86	SAD < PTSD*
Extinction learning
Early
CS+E	30.92	28.00	24.41	25.67	40.77	24.65
CS−	3.93	7.12	11.15	15.14	35.38	26.57	4.13	13.60	1.87	−47.83	−12.09	HC < PTSD***
							2.91	18.44	1.16	−41.73	−6.74	SAD < PTSD**
Late
CS+E	4.72	6.12	21.17	31.92	25.38	24.28	2.98	13.41	1.36	−35.59	−5.74	HC < PTSD**
CS−	1.43	3.63	13.33	29.98	20.38	23.40	2.89	12.54	1.40	−33.19	−4.72	HC < PTSD*
Extinction recall test
CS+E	13.67	4.81	12.33	11.78	36.67	29.53	2.78	12.55	1.34	−40.96	−5.04	HC < PTSD*
							2.79	15.29	1.18	−42.93	−5.74	SAD < PTSD**
CS+U	16.67	19.52	9.67	8.96	26.37	20.43	2.73	15.95	1.14	−29.68	−3.72	SAD < PTSD*
CS−	2.74	3.89	5.33	8.96	23.70	26.72	2.80	12.44	1.37	−37.19	−4.73	HC < PTSD*
							2.37	14.34	1.03	−34.98	−1.75	SAD < PTSD*

HC, healthy controls; SAD, social anxiety disorder; PTSD, posttraumatic stress disorder; Group comparisons were performed using independent t-tests, corrected for multiple comparisons using Bonferroni correction;

^*p≤.05.

^**p≤.01.

^***p≤.001.