Psychology paper

I need four papers total, each research journal article need to write one , each one need 500 words and follow the same guide.

This paper will summarize the attached research journal article. Please include, in your own words: 2 points -- Summary of the key finding of the article 1 points -- Participants in the study (how many, what age/gender, where they came from or how were they selected) 2 points -- Describe the independent variable (what groups were compared, or what was done to the participants) 2 points -- Describe the dependent variable (what was measured) 2 points -- In your opinion, what is the most problematic flaw or limitation of the study? 1 points -- Use APA style citations as needed throughout your paper, and an APA style reference at the end Please use narrative format (paragraphs) rather than bullet points. Papers should be double-spaced and should be 500 words in length. Points will be taken off for spelling and grammar errors.