In assessing the internal validity of an intervention, we try to determine if certain changes cause certain outcomes. It is relevant in studies that try to establish casual relationship. While in observational or descriptive studies, it is not that relevant. It is also possible to have internal validity in a study and not have construct validity. Example, imagine a study where you are looking at the effects of a new computerized tutoring program on math performance in first grade students.
Pedro is a Keynesian economist and argues that in a downturn, state intervention is the key for economic recovery.
Keynesians believe that GDP (Gross Domestic Product) is positively influenced by aggregate demand. Hence, in order to boost GDP growth after a downturn, the state should step in the economy by increasing public expenditure. This will help to create job positions, increase the disposable income of households and therefore increase overall demand for goods and services.
If more goods and services are demanded, the same cycle restarts as firms would hire more staff in order to increase production to a greater extent to meet the new necesities. The more people who is employed, the more income avilable to continue increasing private expenditure and investments, which in turn GDP and bring economic growth.
<em><u>To make it clearer, the following is the GDP formula for a certain time period</u></em>
<em>GDP = Private Consumption + Private investment + Public expenditure + Exports - Imports </em>
Answer: Roland is driven primarily by EXTRINSIC motivation.
Explanation: Extrinsic motivation refers to willingness in action especially in behavior that is primarily driven by external factors such as money, fame, grades, and praise. This is opposed to intrinsic motivation whereby the source of motivation comes from within an individual.
The southern states' economies were heavily reliant on the production of cash crops such as rice, tobacco, indigo, and cotton.
The correct answer is letter B.
Explanation: In this case the most accurate answer is 24 hours because the others not match with the experiment.
