So, for my 2nd SAC, we've done an experiment on perceptual set and will be doing an in-class ERA when school reopens. However, for the experiment, each class was split into 2 groups, and both groups were exposed to the independent variable, thus no control group.
If that's the case, then how would one write an ERA for this experiment? Specifically, the operational hypothesis, the experimental design, and any possible problems that may have risen from using 2 experimental groups.
Though both groups were exposed to the independent variable, the IV for both groups were sort of different. An example (not what we did, but similar) would be that group 1 was exposed to the animals and then shown the ambiguous figure, and group 2 was exposed to the faces of the people, and then shown the ambiguous figure.
Then would the purpose of the experiment be comparing the probability of interpreting the final ambiguous image consistent with the previous images that the participant was exposed to? e.g. see animals, interpret as animal. see people, interpret as person.
Using Bugelski and Alampay's experiment as an example, would an operational hypothesis of an experiment with no control group be something like:
"it was hypothesized that vce 3/4 psychology students from blahblah high school who were exposed to 4 images of animals would be more likely to interpret an ambiguous image as a rat as opposed to those who were exposed to 4 images of people who would be more likely to interpret the same ambiguous image as a man - operationalized as the number of people who consistently saw the ambiguous image as an animal or as a person."
would that be okay?
experimental design: independent groups? since the definition does not exclusively state that the groups participants are allocated to has to be a control and an experimental group...
problems with no control? if the purpose is consistency, then would a control be necessary at all?
maybe a problem would be the ambiguity of the ambiguous image? like the rat/man image looked more like a rat when i first saw it w/o any previous images.