Recruitment

Once the materials for a Web-based study have been assembled and are available on the Web, the recruitment phase begins. Following traditional recruitment methods, participants can be recruited offline, of course. In addition, there are now many Internet methods (e.g., recruitment via Web site, email [including mailing lists], online panel, newsgroup, listings, and banner ads). Recruitment for Web-based studies can be much more effective with one or several of the techniques described by Birnbaum (2001), Birnbaum and Reips (2005), and Reips (2000, 2002b, 2002c, 2002d).

Some of the best places for recruitment are institutionalized Web sites for Internet-based assessment, like those mentioned at the beginning of this chapter. In the case of Web experiments (e.g., the cup example), the study can be announced on the web experiment list and in the Web Experimental Psychology Lab. Figure 6.5 shows the entry form that an experimenter must fill out to put a Web experiment on the Web experiment list.

assessments can also be created with proprietary software. One example is Authorware (McGraw, Tew, & Williams, 2000), which can be used to create functional and attractive study materials. The downside of this approach is a steep learning curve, certain timing issues (Schmidt, 2001), and the fact that it is difficult to get participants to download and install the required plug-in.

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