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The online banking is a banking service that allows users to be “at home” and use the service at any time through an internet connection. In online banking services, the restrictions of time and geography have been removed, and customers can access their bank accounts and make transactions at almost anytime and anywhere via computers and an internet gateway.
There are many studies aimed at determining the factors impacting the intention and decision to choose online banking. However, these studies mainly use the theory of reasoned action (TRA) [9][10], theory of planned behavior (TPB), and technology acceptance model (TAM) [11]. For example, the study of Naruetharadhol et al. [12] developed a model based on TAM to examine the factors affecting the intention to use mobile payments with 688 mobile payment service users in Thailand. Ananda et al. [13] extended TAM to examine the factors influencing the intention to use digital banking with 200 individual customers of seven local banks and two Islamic banks across Oman. Mortimer et al. [14] developed a model based on TAM to empirically examine the motivations affecting the intention to use mobile banking of 348 consumers in Thailand and Australia. These studies have shown the factors affecting the consumer’s acceptance of using banking services. However, according to Venkatesh et al. [15], the studies based on the above theories are not really comprehensive. On the basis of synthesizing the above theories in the most comprehensive way, Venkatesh et al. [16] proposed the Unified Theory of Acceptance and Use of Technology (UTAUT). Due to its high generalizability, UTAUT is used by many researchers to assess the adoption and use of technology [7][8][17][18]. However, UTAUT has still not covered all the factors affecting the adoption and use of technology [15]. Therefore, UTAUT2, as an extension of UTAUT, can assess the factors affecting the adoption and use of online banking services to overcome the limitations of previous studies.
Besides, the previous studies used structural equation modeling (SEM) to estimate the parameters and draw conclusions about the research hypothesis. However, SEM only evaluates the linear relationship between variables in the model but can not evaluate the non-linear relationship. To solve this issue, the artificial neural network model (ANN) can be used to evaluate the non-linear relationship between variables in the model.The demographic structure of the samples is shown in Table 1.
Frequency | Percent | Valid Percent | Cumulative Percent | ||
---|---|---|---|---|---|
Age | 18–35 | 132 | 29.8 | 29.8 | 29.8 |
35–45 | 239 | 54.0 | 54.0 | 83.7 | |
45 or more | 72 | 16.3 | 16.3 | 100.0 | |
Total | 443 | 100.0 | 100.0 | ||
Gender | Female | 244 | 55.1 | 55.1 | 55.1 |
Male | 199 | 44.9 | 44.9 | 100.0 | |
Total | 443 | 100.0 | 100.0 | ||
Degree | Bachelors | 211 | 47.6 | 47.6 | 47.6 |
Doctorate | 79 | 17.8 | 17.8 | 65.5 | |
Masters | 153 | 34.5 | 34.5 | 100.0 | |
Total | 443 | 100.0 | 100.0 |
Table 2 shows the results of the reliability analysis of the scales corresponding to 8 factors in the model: effort expectancy, performance expectancy, brand image, perceived risk, cost value, social influence, behavioral intention to use online banking services, and decision to choose to use online banking services.
Factors | Items | Scale Mean if Item Deleted | Scale Variance if Item Deleted | Corrected Item-Total Correlation | Cronbach’s Alpha if Item Deleted | Cronbach’s Alpha |
---|---|---|---|---|---|---|
Effort Expectancy | DSD1 | 10.13 | 3.396 | 0.601 | 0.751 | 0.797 |
DSD2 | 10.05 | 3.192 | 0.606 | 0.747 | ||
DSD3 | 10.07 | 3.280 | 0.571 | 0.764 | ||
DSD4 | 10.10 | 2.990 | 0.658 | 0.720 | ||
Performance Expectancy | HI1 | 9.49 | 3.065 | 0.637 | 0.790 | 0.827 |
HI2 | 9.35 | 2.964 | 0.649 | 0.784 | ||
HI3 | 8.86 | 2.798 | 0.707 | 0.756 | ||
HI4 | 8.76 | 2.865 | 0.623 | 0.797 | ||
Perceived Risk | RR1 | 8.33 | 3.037 | 0.637 | 0.812 | 0.838 |
RR2 | 7.85 | 3.221 | 0.651 | 0.803 | ||
RR3 | 8.28 | 3.088 | 0.710 | 0.777 | ||
RR4 | 8.42 | 3.153 | 0.686 | 0.788 | ||
Brand Image | HA1 | 10.19 | 3.351 | 0.638 | 0.801 | 0.833 |
HA2 | 10.21 | 3.484 | 0.660 | 0.790 | ||
HA3 | 10.23 | 3.397 | 0.669 | 0.786 | ||
HA4 | 10.25 | 3.554 | 0.687 | 0.779 | ||
Cost Value | CP1 | 10.15 | 4.320 | 0.631 | 0.872 | 0.885 |
CP2 | 10.16 | 4.218 | 0.710 | 0.867 | ||
CP3 | 10.14 | 3.988 | 0.805 | 0.830 | ||
CP4 | 10.16 | 3.830 | 0.860 | 0.808 | ||
Social Influence | XH1 | 10.02 | 3.323 | 0.641 | 0.760 | 0.812 |
XH2 | 9.96 | 3.324 | 0.620 | 0.769 | ||
XH3 | 9.98 | 3.327 | 0.600 | 0.779 | ||
XH4 | 10.13 | 3.098 | 0.662 | 0.749 | ||
Behavioral Intention | YD1 | 10.22 | 4.171 | 0.739 | 0.798 | 0.855 |
YD2 | 10.17 | 4.429 | 0.664 | 0.829 | ||
YD3 | 10.24 | 4.264 | 0.751 | 0.794 | ||
YD4 | 10.16 | 4.385 | 0.640 | 0.840 | ||
Decision to choose | LC1 | 6.81 | 2.184 | 0.687 | 0.813 | 0.847 |
LC2 | 6.74 | 1.887 | 0.770 | 0.732 | ||
LC3 | 6.79 | 2.086 | 0.691 | 0.810 |
The result of the estimations of SEM is presented in Figure 1.
Figure 1. The Structural Equation Model. Effort expectancy (DSD), performance expectancy (HI), perceived risk (RR), brand image (HA), cost value (CP), social influence (XH), behavioral intention (YD), decision to choose (LC).
Table 3 presents the result of the intercorrelation matrix, the values of average variance extracted (AVE), and the composite reliability (CR) of each scale corresponding to each factor in the model. The result shows that AVEs are all greater than 0.5. Therefore, all of the factors in the model converge [19].
CR | AVE | Effort Expectancy | Cost Value | Performance Expectancy | Perceived Risk | Brand Image | Social Influence | Behavioral Intention | |
---|---|---|---|---|---|---|---|---|---|
Effort Expectancy | 0.798 | 0.598 | 0.706 | ||||||
Cost Value | 0.892 | 0.678 | 0.372 | 0.824 | |||||
Performance Expectancy | 0.829 | 0.549 | 0.209 | 0.458 | 0.741 | ||||
Perceived Risk | 0.840 | 0.568 | −0.314 | −0.447 | −0.301 | 0.754 | |||
Brand Image | 0.835 | 0.558 | 0.303 | 0.457 | 0.322 | −0.370 | 0.747 | ||
Social Influence | 0.813 | 0.521 | 0.153 | 0.262 | 0.256 | −0.168 | 0.294 | 0.722 | |
Behavioral Intention | 0.858 | 0.603 | 0.495 | 0.636 | 0.575 | −0.537 | 0.564 | 0.417 | 0.777 |
Table 4 shows that the Chi-square/df value of 2.124 is lower than the threshold of 3, recommended by Carmines and McIver [20]. The values of RFI, AGFI, GFI, and NFI are 0.870, 0.865, 0.890, and 0.887, respectively. For the CFI, TLI, and IFI, the obtained values are all greater than 0.90. The RMSEA is also in the desired range between 0.05 and 0.08 [21]. Thus, the SEM is consistent with the data.
Criteria | Value | Criteria | Value |
---|---|---|---|
Chi-square | 860.212 | NFI | 0.887 |
p-value | 0.000 | CFI | 0.936 |
Chi-square/df | 2.124 | TLI | 0.927 |
RFI | 0.870 | IFI | 0.937 |
AGFI | 0.865 | RMSEA | 0.057 |
GFI | 0.890 |
The estimation result of SEM shows that the factors affecting the behavioral intention to use online banking services are cost value, performance expectancy, perceived risk, brand image, social influence, effort expectancy. Therefore, these six factors will be brought to the input layer of the MLP model. The output layer is the behavioral intention to use online banking services factor. To the hidden layer, in the case of six input factors, the number of neurons in the hidden layer is log2(6)=2.58. Thus, the number of neurons in the hidden layer is 3. The Sigmoid function is used as the activation function of the neurons in the hidden and the output layers. It uses 90% of the sample data to train the model, and the remaining 10% is used to test the accuracy of the model. An MLP model is shown in Figure 2.
Figure 2. MLP model. Effort expectancy (DSD), performance expectancy (HI), perceived risk (RR), brand image (HA), cost value (CP), social influence (XH), behavioral intention (YD).
Image, and social influence all positively impact the intention to use online banking services. Thus, increasing the factors of performance expectancy, cost value, effort expectancy, brand image, and social influence can increase the customer’s intention to use online banking services. While the perceived risk has a negative impact on the intention to use online banking services. That means when customers feel that online banking services are risky, their intention to use online banking services will decrease
At the same time, the intention to use online banking services also has a positive impact on the decision to choose to use online banking services. This result indicates that when customers form an intention to use, they will quickly make a decision to choose online banking services. Thees findings are supported by Venkatesh et al. [15], Polatoglu and Ekin [22], Suganthi [23], Hernandez and Mazzon [24], Poon [25]; Fishbein and Ajzen [10], Taylor and Tood [26], Davis [11], Taylor and Todd [26], Kijsanayotin et al. [27], Tarhini et al. [17], Gupta and Arora [28], Alalwan et al. [29], Yaseen and Qirem [30], Rambocas et al. [31], Linh et al. [32]. Moreover, these results also shed light on the validity of the UTAUT2 model when conducting research on the adoption and use of technology in the Vietnamese market.
There are different impact levels of factors on intention to use online banking services between the MLP and SEM models. Specifically, the SEM model shows that the order of factors affecting the intention to use online banking services from strong to weak is effort expectancy, performance expectancy, perceived risk, brand image, social influence, and cost value, respectively. Meanwhile, the MLP model shows that the order of factors affecting the intention to use online banking services from strong to weak is performance expectancy, cost value, effort expectancy, brand image, perceived risk, and social influence, respectively. From the economic perspective, the results obtained from the MLP model show a better fit than the SEM model.