Evaluating Amazon's Mechanical Turk as a Tool for Experimental Behavioral Research
The top panel compared the results of Nosfosky et al.  to the results of Experiment 10. The bottom compares the results of Lewandowsky  to the results of Experiment 10 giving two different views of the relationship between the online and laboratory based data. Overall, the Type II problem seems more difficult than in previous report (as is the Type VI). However, in general, the instruction manipulation increased the congruence between the online and laboratory data.