“…Interviews were the second most popular, and 21 studies (30%) used this method either as the sole method or as part of a mixed-method design. Testing was used in four of the studies, albeit by slightly different names such as skills testing, 35 multiple choice testing, 36 or pre-and post-testing. 37 Eighteen (26%) of the studies used mixed research methods including different combinations of the following: surveys, testing, writing analysis, 38 focus groups, 39 interviews, 40 website content analysis, 41 research portfolios, 42 key tracking, 43 and collection usage statistics.…”