Judy writes a survey to assess how much people worry. Her survey has 20 questions that people can rate their level of agreement to on a seven-point Likert scale. All of the questions are worded so that higher responses will indicate a higher level of worry. After having 100 people complete her survey, she finds that a lot of respondents often respond to all of the questions by choosing only the "strongly agree" option. How could she improve the construct validity of her survey?
a. She could change the number of response options.
b. She could include reverse-worded items.
c. She could encourage people to be as honest as possible while filling out the survey.
d. She could use the worry questionnaire on a group of people with anxiety disorders.

b. She could include reverse-worded items.

Explanation:

Reverse word are often used to reduce or eliminate bias, it's done by reversing the score that the numerical scale runs in the opposite direction. For example in this case of 7 point likert scale, he will just switch the coding such that strongly agree takes a the 7 code.

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the correct answer is modern american cars are not available due to trade restrictions.

trade between cuba and the united states have serious restrictions. the u.s. imposed an economic embargo on cuba, that among other things means that modern american cars are not available due to trade restrictions.

in response to some governmental actions of the authorities from cuba, president john f. kennedy proclaimed an embargo on trade between both countries in february 1962. the trade embargo remains active until this day and was implemented directly by the departments of commerce and the department of treasury.

in president trump’s administration, there is a national security presidential memorandum that "strengthens the policy of the u. s.", affecting trade with cuba.