Table 2: The critical appraisal tool.

1. Was the sampling method representative of the population intended to the study?
 A. Non-probability sampling (including: purposive, quota, convenience and snowball sampling)
 B. Probability sampling (including: simple random, systematic, stratified g, cluster, two-stage and multi-stage sampling)
2. How was non – response addressed?
 A. Reasons for non- response described?
 B. Reason for non-response not described
3. Did the study report any response rate? (If the reported response rate is below 60%, the question should be answered “No”.)
 A. No
 B. Yes
4. Was the measurement tool used valid and reliable
 A. Yes
 B. No
5. What was the source of the data
 A. Secondary source: survey not specifically designed for the purpose
 B. Primary source
6. Do the authors include the definition of knowledge of child development used for their study?
 A. Yes
 B. No
7. Do the authors include the definition of parenting styles used for their study?
 A. Yes
 B. No
8. Is the knowledge of child development further explored in the study?
 A. Yes
 B. No
9. Is the parenting styles further explored in the study?
 A. Yes
 B. No
Scoring method: Total score divided by total number of all applicable items
Grading of the QACO score:
0% -33% 33%- 66% 67% -100%
Bad Satisfactory Good