Doyen & colleagues (2012) found that __________ effects were the reason that participants changed their walking speed.

A. experimenter
B. subject
C. both subject and experimenter
D. neither subject nor experimenter
MY ANSWER IS C

https://hardsci.wordpress.com/2012/03/12/some-reflections-on-the-bargh-doyen-elderly-walking-priming-brouhaha/

Your answer is correct. According to Doyen & colleagues (2012), both the subject and experimenter had an effect on the participants' change in walking speed.

To find the answer, you need to refer to the study conducted by Doyen and colleagues in 2012. Here's how you can do it:

1. Start by searching for the study. Use search engines like Google Scholar or academic databases such as JSTOR or PubMed.
2. Enter keywords such as "Doyen 2012 study walking speed effects" or a similar combination that you think will yield relevant results.
3. Look for the specific study published by Doyen and colleagues in 2012. You may find the title, authors, and the journal or conference where it was published.
4. Access the full text of the study, either by purchasing it if necessary or by accessing it through your institution's library if you have access to academic resources.
5. Once you have the study, search for the section that discusses the effects of walking speed changes in relation to the participants. It could be in the Introduction, Methods, or Results section, depending on how the study is organized.
6. Read that section carefully to determine the answer to the question.

If you have already completed these steps and found the answer to be C (both subject and experimenter), then that is the correct response according to your understanding of the study.