Chapter 3 88 In the univariate regression analyses (Table 6), three change scores were found to significantly explain variance in the NFR change score, respectively LE (p = .03), personal adjustments (p < .01), and SSQ quality (p <.01). In the hierarchical regression analyses, the amount of variance changed significantly when the determinants subjective listening effort, personal adjustments, and SSQ quality were added to the model (Table 7). The amount of explained variance was highest when the personal adjustments were added to the model. This model explained 53 percent of the variance in the change in NFR. All change scores, except for the communication strategies change score, were found to significantly explain variance in the LE change score in the univariate regression analyses, respectively personal adjustments (p = .04), auditory work demands (p = .01), SSQ speech (p < .01), SSQ spatial (p = .03), and SSQ quality (p = .03). In the hierarchical regression analyses, the amount of variance changed significantly when the SSQ speech was added to the model (Table 7). This model explained 12 percent of the variance in the change in LE. Table 6. Results of the univariate regression analysis of the factors associated with change in the need for recovery and subjective listening effort Determinant B 95% CI p R2 Change in need for recovery Subjective listening effort 1.40 -9.12 ; -0.19 .03 .10 Personal adjustments -1.23 -1.69; -0.78 <.01 .45 Communication strategies 0.02 -0.56 ; 0.60 .94 .00 Auditory work demands -0.01 -0.97 ; 0.99 .98 .00 SSQ speech -2.12 -5.21 ; 0.97 .17 .04 SSQ spatial -1.95 -4.39 ; 0.85 .14 .06 SSQ quality -5.24 -7.82 ; -2.66 < .01 .28 Change in subjective listening effort Personal adjustments -0.13 -0.56 ; -0.01 .04 .11 Communication strategies -0.11 -0.26 ; 0.02 .09 .07 Auditory work demands 0.25 0.06 ; 0.44 .01 .12 SSQ speech -1.08 -1.70 ; -0.47 <.01 .22 SSQ spatial -0.59 -1.12 ; -0.08 .03 .10 SSQ quality -0.71 -1.34 ; -0.09 .03 .11 SSQ indicates Speech, Spatial, and Qualities of hearing scale.
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