Table 4.

Linear Mixed Model for Intake per Minute (Natural Log Transformed).

Variable	b	95% CI	t	P > |t|	F	P > F
Intercept	0.766	[0.494, 1.038]	5.58	< .001
Staff positive utterances/minute	−0.006	[−0.054, 0.041]	−0.26	.793	0.57	.452
Resident positive utterances/minute					2.13	.125
Between 0 and 3 vs. 0	0.193	[0.000, 0.386]	1.99	.049
3 or more vs. 0	−0.012	[−0.522, 0.498]	−0.05	.963
Resident negative utterances (no vs. 1 or more)	−0.029	[−0.159, 0.101]	−0.45	.655	0.20	.655
Food type (liquid vs. solid food)	−0.450	[−0.682, −0.219]	−3.86	< .001	14.91	< .001
Video duration [ln(minutes)]	0.111	[−0.022, 0.244]	1.65	.102	0.10	.758
Staff positive utterances/minute * food type (liquid vs. solid food)	0.046	[0.005, 0.087]	2.25	.027	5.05	.027
Staff positive utterances/minute * resident positive utterances/minute					3.64	.030
Between 0 and 3 vs. 0	−0.060	[−0.107, 0.014]	−2.56	.012
3 or more vs. 0	−0.019	[−0.085, 0.047]	−0.58	.564
Resident negative utterances (no vs. 1 or more) * video duration [ln(minutes)]	−0.247	[−0.403, −0.091]	−3.15	.002	9.89	.002
Years staff worked as a caregiver	−0.001	[−0.011, 0.009]	−0.17	.869	0.03	.869
Resident age (years)	−0.007	[−0.016, 0.001]	−1.85	.072	3.42	.072
Resident gender (male vs. female)	0.162	[0.032, 0.291]	2.59	.017	6.73	.017
Resident eating function (proportion of intake episodes initiated by resident)					1.59	.227
0 – 25% vs. 75% – 100%	−0.050	[−0.212, 0.112]	−0.64	.530
Between 25% and 75% vs. 75% – 100%	0.079	[−0.076, 0.233]	1.04	.308

Note: b = unstandardized regression coefficient estimate; 95% CI = 95% confidence interval; p > |t| = p-values for a t-test of significance of an effect or a level of an effect; p > F = p-values for an F-test of significance of each effect overall. N = 104 videos.