Provide example for each experimental study, psychology homework help

Give your own example of each of the following:

1. An experimental study using the naturalistic observation data collection technique

2. A quasi-experimental study using the archival data collection technique

3. A correlational study using the survey/questionnaire data collection technique

4. A case study using the systematic observation data collection technique

Answer these question with 50-100 words

1.  Explain why use of the naturalistic observation technique is likely to increase the external validity of a study.

2.  Explain why use of the systematic observation technique is likely to increase the internal validity of a study.