Answer: The James-Lange theory
Explanation: The James-Lange theory argues that emotional reactions felt in human stirs from physical interpretation attached to the physiological (relates to the way or manner in which the bodily parts of an individual functions) response which emanates due to an external or environmental stimulus.
In essence, James-Lange theory proposed by William James and Carl Lange opines that physical interpretation of physiological responses determines emotional reaction.
In the scenario above, Harry wants to use physiological response and physical interpretation attached to facial smile will translate into an emotional state of being happier.
Explanation:
A developed country (or industrialized country, high-income country, more economically developed country (MEDC)) is a sovereign state that has a high quality of life, developed economy and advanced technological infrastructure relative to other less industrialized nations. Most commonly, the criteria for evaluating the degree of economic development are gross domestic product (GDP), gross national product (GNP), the per capita income, level of industrialization, amount of widespread infrastructure and general standard of living.
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<span>This is an example of "The Observer Effect". Researchers will get skewed or inaccurate data if they don't take this "Observer Effect" into account when conducting research or studies.</span>