This research examines the relationship between consumer attitudes and decisions. By examining the attitude forming variables, among others, usefulness, ease of use and risk which directly influence attitudes and the direct influence of consumer attitudes on consumer decisions. The population in this study is a large number of consumers and the amount is not known with certainty, the researchers, for the sample using a random sampling method which is part of the non-probability sampling technique with the criteria of respondents who have shopped in offline retail and online retail, over 17 years old and domiciled in Jakarta. Samples taken amounted to 160 with 32 questions for each respondent. The results show that usefulness and ease of use affect consumer attitudes. While ease of use is the most powerful variable and has the biggest contribution that influences attitude. In this research hypothesis there is one hypothesis that is rejected, namely the effect of risk on attitude attitudes, the results of the study found that risk has no effect on attitude.

In this study, researchers examined how consumer decisions on purchases in e-commerce are particularly influenced by trust, attitudes and the ease of new shopping places. The data collection research was conducted using a questionnaire with 130 consumer respondents who had bought at ecommerce which would later be processed by Amos' Structural Equation Modeling (SEM). The study used four variables, thirteen dimensions and twenty-six indicators. The results showed that trust, convenience and attitudes influenced consumer decisions in buying e-commerce. The results also showed that trust had the greatest and most significant influence on consumer decisions to buy in e-commerce. So, it can be said that consumers buy because it is based on a sense of already trusting an e-commerce to make e-commerce crowded and buyers need to pay attention to improving their taste.