Note that appears after an appropriate answer

[FONT=Calibri][SIZE=3][COLOR=#000000]I plan to run an experiment where subjects will be exposed to a number of images (randomly presented). Each image will be presented to them for several seconds. I would like to do three things and would greatly appreciate your advice with it. How do I…[/COLOR][/SIZE][/FONT]
[COLOR=#000000][FONT=Calibri][FONT=Calibri][SIZE=3]1.[/SIZE][/FONT] [/FONT][FONT=Calibri][SIZE=3]Create questionnaire where subjects are instructed to press space bar when they encounter an attractive image. [/SIZE][/FONT][/COLOR]
[COLOR=#000000][FONT=Calibri][FONT=Calibri][SIZE=3]2.[/SIZE][/FONT] [/FONT][FONT=Calibri][SIZE=3]Once they select an attractive image (press space bar) I would like a window to appear that tells them they made a good selection. [/SIZE][/FONT][/COLOR]
[COLOR=#000000][FONT=Calibri][FONT=Calibri][SIZE=3]3.[/SIZE][/FONT] [/FONT][FONT=Calibri][SIZE=3]I would like Media Lab to record the number of “good selections” each subject made. [/SIZE][/FONT][/COLOR]
[FONT=Calibri][SIZE=3][COLOR=#000000]Thanks a lot. [/COLOR][/SIZE][/FONT]
[FONT=Calibri][SIZE=3][COLOR=#000000]Srdan [/COLOR][/SIZE][/FONT]

To get started with MediaLab, you may want to run through the samples within the samples directory.
It may also be beneficial to read through the help files.

It sounds like DirectRT could fit this type of experiment better; however MediaLab will work.

One way of accomplishing your task would require using the duration (d) parameter to take the user through each questionnaire and then denote a 'SkipTo' option if they answered the question correctly.