I just want to note that the heading formats in the sample paper do not match how you instructed them to format them earlier, but these are correct.

It would be helpful if the sample title page had the correct format for a first page running head.

Example? You gave the Darley example, so it would be nice to have one here for contrast.

Can you provide an example or sample of this?

I would expect this to be in the method section not the results. It's part of the operational definition of the variable.

In this example please write at least one that shows a measures subsection.

This is not APA format. Please do not instruct my students to write in any way that contradicts the APA manual. I have a hard enough time getting them to do it correctly, without them coming back and telling me the textbook says they don't have to. And, even your example doesn't match this (ironically, the example is correct).

I understand that this is a classic study, but I'm perplexed as to why it was chosen to illustrate how to write this section. I really think it would be much better to use something considerably more current as an example of how psychologists write today. In addition, I'm personally unlikely to suggest my students write like this. It's wordy and contains information that I would prefer be limited to the procedures section of the method. While I understand this is personal preference and the author is free to ignore it, it would impact my choice of this as a textbook, which I feel is something you should know. Perhaps a compromise would be to also include a sample that is written differently, more to show that there are alternatives than prescribe a specific style.

It might be helpful here to mention that this is where the hypotheses are found.

The current expectation is to include certain statistics as well.

What is your source? This is not in the publication manual.

If it's not available, authors are to include the url of the journal. Please include this. As currently written, it looks like they can just write nothing if there's no doi.

Considering the style blog is authoritative, you should include it in this list. https://blog.apastyle.org/

Update this too. And there isn't a space after the colon.

Please update this. This is 2 versions out of date. Current format is https://doi.org/10.xxxxxxx See the apa style blog, March 2017 update for more.

Comma splice?

Schwartz at al. (2017) make a useful distinction between writing style and formatting. This section would benefit from that expansion.

I like this phrase.

This section is nicely done.

It would have better to have described it this way from the beginning. In the opening section (10) only the first 3 stages are mentioned, and is unclear in 10.1.

I'm not actually sure what the definition of social validity is here. The "this" in this sentence doesn't have a clear antecedent.

I'm curious why you're not using this term too. You've just pointed out that single subject isn't accurate, yet you continue to use the term even though this clearer term is available.

Did they? It's not mentioned as part of the design in the previous section (10) or in the sentence above.

This paragraph is repetitive. "Once again" "to summarize". Try to straighten it out.

Redundant

This really should say "the effect of disgust on moral judgements" in order to be clear how interactions are interpreted.

Of?

This example doesn't make sense. The effect of therapy is presented as the DV, so how can there be a group that doesn't receive it as an IV?

Comma please

Bold?

This is a little farfetched. It would help if you gave a more realistic example that more closely matches what students might see in the real world.