Which of the following are considered "credible sources"? Check all that apply.

materials published within last 10 years
research articles written by respected and well-known authors
websites registered by government and educational institutions (.gov, .edu, .org)
academic databases
all of the above

all of the above

All of the above are considered credible sources.

To determine which sources are considered credible, we need to evaluate each option.

1. Materials published within the last 10 years: This can be a good indicator of relevance and currency, but it does not guarantee credibility on its own. However, if the materials are published by reputable publishers or academic institutions, they are more likely to be considered credible.

2. Research articles written by respected and well-known authors: Research articles written by respected and well-known authors are generally considered credible. These authors have typically undergone rigorous peer review and are recognized in their field of expertise. However, it is still important to assess the quality of the specific article and the reputation of the publication it appears in.

3. Websites registered by government and educational institutions (.gov, .edu, .org): Websites with domain extensions like .gov (government), .edu (educational), and .org (non-profit organizations) are generally considered more credible. However, this does not automatically guarantee credibility, as some .gov or .edu websites may have biased or outdated information. It's important to critically evaluate the content and sources cited on these websites.

4. Academic databases: Academic databases, such as those accessible through university libraries, are generally considered credible sources. These databases typically house peer-reviewed scholarly articles and research studies. However, it is still essential to evaluate the quality, relevance, and methodology of the specific articles retrieved from these databases.

Based on the explanations, the options that are considered credible sources are:

- Research articles written by respected and well-known authors
- Websites registered by government and educational institutions (.gov, .edu, .org)
- Academic databases

Therefore, the correct answer is "all of the above."