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Table 4. Results of confirmatory analyses on comprehensibility (H1), credibility (H3), ability to evaluate (H4) and ability to make a decision (H5). Estimates are based on mixed models with (contrasts of) fixed effects for type of presented research summary (plain language summary with/without subheadings and ordinary scientific abstract) and random effects for participant and study.
OutcomeParameterESTSEpSTD.EST
Comprehensibility Random Effect Participant 0.655    
 Random Effect Study 0.669    
 Residual 2.034    
 Intercept (PLS with Subheadings) 6.305 0.251 <.001  
 No Subheadings -0.352 0.081 <.001 -0.247 
 OSA -0.894 0.080 <.001 -0.627 
 OSA – No Subheadings -0.542 0.078 <.001 -0.380 
 Marginal R2/Conditional R2 .038/.418    
Credibility Random Effect Participant 0.897    
 Random Effect Study 0.115    
 Residual 1.605    
 Intercept (PLS with Subheadings) 5.365 0.133 <.001  
 No Subheadings -0.171 0.072 .017 -0.135 
 OSA -0.182 0.071 .011 -0.143 
 OSA – No Subheadings -0.011 0.070 .877 -0.009 
 Marginal R2/Conditional R2 .003/.388    
Ability to evaluate Random Effect Participant 1.748    
 Random Effect Study 0.083    
 Residual 1.573    
 Intercept (PLS with Subheadings) 3.726 0.142 <.001  
 No Subheadings -0.220 0.071 .002 -0.175 
 OSA -0.267 0.071 <.001 -0.213 
 OSA – No Subheadings -0.047 0.069 .492 -0.038 
 Marginal R2/Conditional R2 .004/.540    
Ability to make a decision Random Effect Participant 1.328    
 Random Effect Study 0.060    
 Residual 1.582    
 Intercept (PLS with Subheadings) 3.117 0.125 <.001  
 No Subheadings -0.336 0.071 <.001 -0.267 
 OSA -0.361 0.071 <.001 -0.287 
 OSA – No Subheadings -0.025 0.069 .717 -0.020 
 Marginal R2/Conditional R2 .009/.472    
OutcomeParameterESTSEpSTD.EST
Comprehensibility Random Effect Participant 0.655    
 Random Effect Study 0.669    
 Residual 2.034    
 Intercept (PLS with Subheadings) 6.305 0.251 <.001  
 No Subheadings -0.352 0.081 <.001 -0.247 
 OSA -0.894 0.080 <.001 -0.627 
 OSA – No Subheadings -0.542 0.078 <.001 -0.380 
 Marginal R2/Conditional R2 .038/.418    
Credibility Random Effect Participant 0.897    
 Random Effect Study 0.115    
 Residual 1.605    
 Intercept (PLS with Subheadings) 5.365 0.133 <.001  
 No Subheadings -0.171 0.072 .017 -0.135 
 OSA -0.182 0.071 .011 -0.143 
 OSA – No Subheadings -0.011 0.070 .877 -0.009 
 Marginal R2/Conditional R2 .003/.388    
Ability to evaluate Random Effect Participant 1.748    
 Random Effect Study 0.083    
 Residual 1.573    
 Intercept (PLS with Subheadings) 3.726 0.142 <.001  
 No Subheadings -0.220 0.071 .002 -0.175 
 OSA -0.267 0.071 <.001 -0.213 
 OSA – No Subheadings -0.047 0.069 .492 -0.038 
 Marginal R2/Conditional R2 .004/.540    
Ability to make a decision Random Effect Participant 1.328    
 Random Effect Study 0.060    
 Residual 1.582    
 Intercept (PLS with Subheadings) 3.117 0.125 <.001  
 No Subheadings -0.336 0.071 <.001 -0.267 
 OSA -0.361 0.071 <.001 -0.287 
 OSA – No Subheadings -0.025 0.069 .717 -0.020 
 Marginal R2/Conditional R2 .009/.472    

Note.EST = estimates for variances of residuals and random effects, unstandardized regression weights and marginal/conditional R2(see Nakagawa et al., 2013); SE = standard error, p = p-value of two-tailed significance test; STD. EST = standardized regression weights; PLS = plain language summary, OSA = ordinary scientific abstract; comprehensibility/credibility were measured on 1 to 8 semantic differentials and ability to evaluate/to make a decision on 1 to 8 Likert scales

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