Results

Evaluation of measurement model

Table 2 results indicate that all loading items of the measurement model are greater than 0.70 and are found significant at a 0.05% level. It shows the items' level convergent validity as well. Composite reliability Cronbach's alpha values are more than 0.70, indicating acceptable reliability levels. Moreover, the AVE values of all items at the construct level are found to be more than 0.50. The heterotrait-monotrait (HTMT) values in all items are below 0.90, as mentioned in Table 3, which demonstrates the study's discriminant validity.

Table 2 Model Measurement

Constructs Items LVs CR α AVE R2
Emotions (E)          
Hope E1 0.807 0.851 0.783 0.663  
E2 0.811        
Pride E3 0.752 0.786 0.817 0.681  
E4 0.773        
Sadness E5 0.837 0.793 0.849 0.652  
E6 0.808        
Fear E7 0.819 0.825 0.825 0.661  
E8 0.794        
Appeal Drivers (A)          
Message A1 0.835 0.788 0.721 0.585  
A2 0.786        
Picture quality A3 0.822 0.857 0.746 0.637  
A4 0.817        
Color A5 0.773 0.810 0.717 0.593  
A6 0.741        
Music A7 0.832 0.863 0.733 0.539  
A8 0.818        
Celebrities (C)          
Showbiz C1 0.853 0.811 0.738 0.675  
C2 0.827        
Sports C3 0.877 0.865 0.716 0.611  
C4 0.846        
Attention (AT
  AT1 0.776 0.901 0.855 0.701 0.605
  AT2 0.862        
  AT3 0.863        
Consumer Behavior (CB) CB1 0.861 0.921 0.887 0.745 0.709
CB2 0.873        
CB3 0.856        
  1. Note: All loadings are significant at 0.05% level of significance (2-tailed)
  2. LV Loading Values, C.R Composite Reliability, α Cronbach’s alpha, AVE Average Variance Extracted, R2 Coefficient of Determination

Table 3 Heterotrait monotrait (HTMT) analysis results

HTMT 1 2 3 4 5
1 Emotions          
2 Appeal Drivers 0.46        
3 Celebrities 0.42 0.61      
4 Consumer Behavior 0.44 0.59 0.58    
5 Attention 0.55 0.64 0.62 0.68  

Structural model evaluation

This study shows path coefficients and coefficients of determination (R2) for structural model measurement. Moreover, a bootstrapping method (resampling) adopted with 5000 for the observations as the original sample (n = 240) for t-values and standard error. Magnitude and signs of path coefficients (as mentioned in Table 4 and Fig. 2) estimate the path relationship among the model variables.

Table 4 Path coefficients of model and significant testing of hypotheses (Direct Effect)

Structural Path Path Coefficients (t-value) Confidence Interval P-value (0.05%) Results
E➙CB 0.223 (5.836) (0.152–0.305) 0.001 Accepted
A➙CB 0.231 (4.462) (0.132–0.342) 0.000 Accepted
C➙CB 0.082 (2.733) (0.023–0.143) 0.004 Accepted
AT➙CB 0.348 (7.924) (0.262–0.432) 0.000  
E➙AT 0.331 (7.826) (0.247–0.413) 0.000  
A➙AT 0.301 (5.472) (0.192–0.408) 0.011  
C➙AT 0.094 (2.523) (0.018–0.171) 0.001  

Fig. 2 Structural model results

Fig. 2 Structural model results

Coefficients of determination (R2) values for endogenous variables are found adequate in this study (i.e., above the 10% level) (Falk and Miller, 1992). R2 values for attention (0.605) and consumer behavior (0.709) are moderate and considered appropriate for the study (Fig. 2). Beta and p values in Table 4 results show that the direct relationship of emotions (β = 0.223 (5.836), p = 0.001), appeal drivers (β = 0.231(4.462), p = 0.000) and celebrities (β = 0.082(2.733), p = 0.004) with consumer behavior are highly significant at 0.05% level. These results provide valid support for the proposed hypotheses H1, H2 and H3.


Mediation testing and analysis

Non-parametric bootstrapping was applied to measure the mediating effect significance. Results in Table 5 show that the indirect/mediation between emotions, appeal drivers, celebrity endorsement, and consumer behavior is significant (i.e., t > 1.96 at p = 0.05%). However, the indirect/mediation beta value effects are less than the direct beta value effects for each related construct. It shows that the mediation variable (attention levels) absorbed some percentage of the direct effect as well. These results support the proposed hypotheses H4a, H4b and H4c. Since the indirect effect in this study is significant between the constructs with absorption effect, it justifies the mediation requirement effect mentioned by Hair et al.. Hence, bootstrapping analysis results, shown in Table 4, meet the necessary requirements for a mediator measurement effect. VAF (Variance account for) results in Table 5 are found to be between 20% to 80% which identifies the mediation effect of attention levels on emotions, appeal drivers, and celebrities as partial mediation.

Table 5 Bootstrapping Mediation test (Indirect / Mediation Effect)

Structural Path Direct Effect (t- Value) Indirect Effect (t- Value) Total Effect` VAF (%) Interpretation Results
E➙AT➙CB 0.223 0.114 0.337 34.16 Partial Mediation Accepted
(5.836) (5.686)        
A➙AT➙CB 0.231 0.103 0.334 31.24 Partial Mediation Accepted
(4.462) (4.236)        
C➙AT➙CB 0.082 0.034 0.116 29.12 Partial Mediation Accepted
(2.733) (2.476)        
  1. VAF variance accounted for, n.s not significant; |t| > =1.96 at p = 0.05 level; The VAF > 80% indicates full mediation, 20% ≤ VAF ≥ 80% shows partial mediation while VAF <20% is no mediation

The ranking analysis shows that overall the participants positively preferred music and color appeal drivers over the other appeal drivers being tested in the present study with the highest mean values (i.e., Meanmusic = 5.46, Meancolors = 4.55) and lowest standard deviation values comparatively (i.e., S.Dmusic = 1.53, S.Dcolors = 1.79) as compared to the other appeal drivers (Meanpicture = 4.38, S.Dpicture = 1.82; Meanmessage = 3.34, S.Dmessage = 1.88). This is shown in Table 6 and Fig. 3. Likewise, the study respondents positively preferred the emotions of happiness and pride over the other emotions being tested with the highest mean values (i.e., Meanhappiness = 5.86, Meanpride = 4.43) and the lowest standard deviation values (i.e., S.Dhappiness = 1.52, S.Dpride = 1.80) as compared to the other emotional stimuli (Meanfear = 4.31, S.Dfear = 1.87; Meansadness = 3.28, S.Dsadness = 1.90). This is shown in Table 7 and Fig. 4. In terms of celebrity choice, a celebrity endorser from the showbiz industry was preferred, with a mean value of 5.67 and low standard deviation value of 1.55, over a sport celebrity (Meansports = 4.58, S.Dsports = 1.69). This trend has been summarized in Table 8 and Fig. 5.

Table 6 Most preferred Appeal Drivers

Music Colors
1 2
Mean = 5.46 Mean = 4.55
S.D = 1.53 S.D = 1.79
Message Picture quality
4 3
Mean = 3.34 Mean = 4.38
S.D = 1.88 S.D = 1.82

Fig. 3 Most preferred appeal drivers

Fig. 3 Most preferred appeal drivers

Table 7 Most preferred emotions

Happiness Pride
1 2
Mean = 5.86 Mean = 4.43
S.D = 1.52 S.D = 1.80
Sadness Fear
4 3
Mean = 3.28 Mean = 4.31
S.D = 1.90 S.D = 1.87

Fig. 4 Most preferred emotions

Fig. 4 Most preferred emotions


Table 8 Most preferred type of celebrity

Showbiz Sports
1 2
Mean = 5.67 Mean = 4.58
S.D = 1.55 S.D = 1.69

Fig. 5 Most preferred type of celebrity

Fig. 5 Most preferred type of celebrity