JMP for Recall Experiment Set up your data table with explanatory variables; Reinforce, Isolate and Treatment. These variables should be Data Type - Character variables. The response variable Recall should be Data Type - Continuous. Go to the Modeling menu and choose Fit Model. Choose Recall as the Y variable. Add Reinforce and Isolate as terms of the model. By highlighting both Reinforce and Isolate and clicking on Cross, the interaction term will be included in the model. Alternatively, you can highlight both Reinforce and Isolate and go to the Macros pull down and click on Full Factorial. This will enter each main effect and an interaction term. Then, just click on Run Model. Response Recall Whole Model Summary of Fit RSquare RSquare Adj Root Mean Square Error Mean of Response Observations (or Sum Wgts) 0.79292 0.735398 3.605551 24 24 1 Analysis of Variance Source Model Error C. Total DF 5 18 23 Sum of Squares 896.0000 234.0000 1130.0000 Mean Square 179.200 13.000 F Ratio 13.7846 Prob > F <.0001 Effect Tests Source Reinforce Isolate Reinforce*Isolate Nparm 1 2 2 DF 1 2 2 Sum of Squares 96.00000 196.00000 604.00000 F Ratio 7.3846 7.5385 23.2308 Prob > F 0.0141 0.0042 <.0001 Residual by Predicted Plot Recall Residual 7.5 5.0 2.5 0.0 -2.5 -5.0 -7.5 5 10 15 20 25 30 Recall Predicted 35 40 Isolate: Least Squares Means Table Level 20 40 60 Least Sq Mean 21.500000 28.000000 22.500000 Std Error 1.2747549 1.2747549 1.2747549 Mean 21.5000 28.0000 22.5000 LSMeans Differences Student's t Alpha = 0.050 Q = 2.10092 LSMean[i] By LSMean[j] Mean[i]-Mean[j] Std Err Dif Lower CL Dif Upper CL Dif 20 40 60 20 40 60 0 0 0 0 6.5 1.80278 2.71251 10.2875 1 1.80278 -2.7875 4.78749 -6.5 1.80278 -10.287 -2.7125 0 0 0 0 -5.5 1.80278 -9.2875 -1.7125 -1 1.80278 -4.7875 2.78749 5.5 1.80278 1.71251 9.28749 0 0 0 0 2