Dr. kang, a cognitive psychologist, conducts an experiment examining the effect of emotion on memory. he provides lists of 15 words to two groups of participants at his university. he puts the names of all the participants in a hat. the first 20 names he assigns to group a and the last 20 he assigns to group b. group a is given a list of words that are very emotional in content (e. g., passion, murder). group b is given a list of words that are neutral in content (e. g., houseplant, desk). he then measures how many words each group is able to remember after being distracted for 5 minutes by watching a video about the history of the university. he finds that group a remembers 15% more words than group b. refer to research study 3.4 above to answer the following question. if dr. kang decided against using random assignment, which of the following would be threatened? a. the covariance of the study b. the temporal precedence of the study c. the internal validity of the study d. the external validity of the study e. the construct validity of the study

c. The internal validity of the study

Explanation:

The internal validity of a study is the term that refers to the ability of a study to show that it has a practical skill, through how well the results of that study have been established. in other words, this validity refers to a study that presents a good performance, because it was established with a correct design, well-developed variables, well-established results evaluation, among other factors, which show that the study was carried out correctly, so your results can be reliable.

If Dr. Kang decided not to use random assignment, the study's internal validity could be a threat to prove the truth, since we have little information on how the entire study was conducted.

answer; (d) one tectonic plate plunges beneath another; (most common,convergent boundaries)

levels of production can be increased by technology while holding labor and capital constant, because increased technology makes the production process more efficient. subsequently, the lras curve is almost a vertical line, that can shift to the right, with an increase in technology.

the relationship between the lras curve and the ppc is that both can make the economy could grow. the ppc achieves that when it shifts outward because of more resources or technological advances while the lras curve shifts if more resources are developed or if there are technological advances.

the lras curve is a vertical line at an output level that represents the number of goods and services a nation can produce over a sustained period using all of its productive resources as efficiently as possible with all of the current technology available to it.

the production possibilities frontier (ppf) is a graphical device that is used for economic analysis of production decisions because the ppf measures the maximum possible combinations of two goods that an economy is capable of producing with its currently available resources and technology.