Which Situation Presents a Threat to Internal Validity

question 5

Multiple Choice

Which situation presents a threat to internal validity?

• A) subjects dropping out of an experiment
• B) selecting a random sample
• C) randomization of group assignments
• D) very high reliability of outcome measures

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Electronic accounts that enable users to send, receive, and manage electronic mail (email) messages through a mail server.

Email

A method of exchanging digital messages across the Internet or other computer networks, using a set structure involving a sender, recipient, subject, and message body.

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A secure password that uses a mix of letters, numbers, and special characters, making it difficult for others to guess or hack.

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A simplistic example often used to illustrate a weak or common password.