Answer:
The research strategy that is used to demonstrate infant depth perception is called:
B. The visual cliff.
Explanation:
The visual cliff is a social study <u>created in 1957 in the USA</u> where the researchers saw <u>if a baby crawls normally on a surface has the capacity to identify the depth in that surface</u>, so, this was located at a certain height, a part of this was normal and the other part is a translucent glass with the mother at the other side of the cliff, in the results, <u>the babies regularly identified the cliff</u> <em>but could crawl on the glass if the mother smile him/her or definitively stop before the cliff if the mother made angry or scared</em>.
Answer:
The main threat to internal validity here is History.
Explanation:
Internal validity refers to how well a research is conducted. Internal validity determines if it's the independent variable (or another factor) that caused or resulted in the change in the dependent variable.
History here alludes to the internal validity threat that refers to events outside of the experimental setting (increase in cigarette taxes) that may affect the dependent variable (smoking cessation).
the second choice Mao's Red Guards started harassing Chinese intellectuals who supported capitalism.
<span>They both have a celebration of the Queen's Birthday.
</span>
I know that Canada celibrates queens birthday
Answer:
True
Explanation:
Florida delegates who were meeting in the state capital, Tallahassee, voted to secede from the U.S. Florida became one of the six original Southern states to form the Confederate States of America; eventually, 11 states would leave the Union.
