palestinian refugees are people who lost both their homes and means of livelihood as a result of the 1948 arab–israeli conflict and the 1967 six-day war. the number of palestinians who fled or were expelled from israel following its creation was estimated at 711,000 in 1949.
it has a big effect on happiness.
from the case described in the question, it seems that the researcher is inducing the smith family to enroll their children in the study with the promise of free healthcare, despite the possibility of harm to the children.
in this case, the researcher is violating the first principle mentioned in the apa code of ethics, which is beneficence and nonmaleficence. this principle states that psychologists must perform work that is beneficial to others, but does not hurt anyone in the process of carrying out the work.