Table 2.

Means, standard deviations, and range of acquisition of declarative knowledge for phase 1.

					95% CI for mean
	N	Mean	Std. deviation	Std. error	Lower bound	Upper bound	Min	Max
Three quizzes
Group S	18	20.19	1.800	0.424	19.29	21.08	18.33	23.33
Group C	18	23.61	1.428	0.196	22.90	24.32	21.67	25
Group S&C	18	17.32	0.832	0.196	16.90	17.73	16.67	18.33
Exam 1
Group S	18	46.11	5.016	1.182	43.62	48.61	35	50
Group C	18	48.61	2.873	0.677	47.18	50.04	40	50
Group S&C	18	42.22	5.208	1.228	39.63	44.81	35	50

Dependent variable, Deaf students’ acquisition of declarative knowledge in phase 1; Independent variable, Accommodation comprising three treatments of sign language interpreter only (Group S), captions only (Group C), and sign language interpreter and captions combined (Group S&C). The score utilized for the analysis of the three quizzes is the average of the total of 75 points possible for these assessments, which is 25; the score utilized for the exam is 50.