From goyals4848 at gmail.com Wed Mar 27 18:27:12 2019 From: goyals4848 at gmail.com (Shivani Goyal) Date: Wed, 27 Mar 2019 13:27:12 -0400 Subject: [Rcicr-users] InfoVal and Calculating Pixel Luminance Values Message-ID: <999CCE5D-91DB-4519-964B-1DA520793F80@gmail.com> Hi All, I have run into two roadblocks with my reverse correlation study. My first issue concerns calculating infoVal scores. Following the use of the command "computeInfoVal2IFC(ci, rdata)," I have been receiving the message "Error: $ operator is invalid for atomic vectors." Would you happen to know how I can resolve this error? My second roadblock regards calculating Cronbach's alpha on pixel luminance values for participants' CI noise patterns. Would anyone be able to refer me to a source for how to compute this function in R? I am hoping to compute Cronbach's alpha and to then correlate pixel luminance values between my classification images for different constructs. While I understand how to calculate these functions for numerical values, I am unsure how to do so for pixel luminance values. Thank you so much for your help! Best, Shivani -------------- next part -------------- An HTML attachment was scrubbed... URL: