I am a MRes student working in the builder view trying to create a adaptation paradigm to images of certain BMI, which I have successfully been able to do. However at the end of this adaptation period I want to present the participant an image of a body and then the participant can then use the left arrow to decrease the body size of the image and the right arrow to increase the body size of the image and then press the space bar to enter their result when they are happy with the size of the body. I have images to work from including 60 body images from a low to a high BMI I just don’t know how I would be able to do this. I also don’t want the slider to be visible to the participant
Could you offer any help?