The second research question investigated researchers’ motivations to participate in RIMSs. Table 7 provides a summary of the motivation scales developed for the three activities. The numbers indicate the ranking of each motivation scale relative to the other motivation scales for an activity. The question-answering and endorsement activities had similar motivation scales. Both had similar sets of motivation scales and were ranked similarly, although the question-answering activity had one extra scale (External Pressure). Expertise was the top-rated scale for question-answering and endorsement activities. In addition, Enjoyment was common for all three activities and shared the second highest ranking. Build Community Ties shared the second highest ranking with Enjoyment for the question-answering and endorsement activities. Thus, Expertise, Enjoyment, and Build Community Ties were rated higher for the question-answering and endorsement activities compared with other motivations. These motivations can be categorized as intrinsic. Self-determination theory postulates that for a person to be intrinsically motivated, the person must feel competent, inherently autonomous, and related to others and must find the overall activity she or he is performing interesting or pleasant .