Dr. aba is conducting a study to see whether there is a relationship between birth order and shyness. to assess participants' shyness, dr. aba uses a questionnaire: a score of 0-5 on the questionnaire indicates extreme shyness; 6-10, moderate shyness; 11-15, normal shyness; 16-20, moderate lack of shyness; and 21-25, extreme lack of shyness. this use of the questionnaire establishes a(n) of shyness.

We can define operational definition as it explains the concepts or variables by the way they are measured, anything that can be measured is a variable. Dr. Aba is conducting a study between birth order and shyness, so she needs to develop an operational definition of birth order and shyness.

early settlements on the subcontinent. both the indus and the ganges rivers carried rich silt from the mountains to the plains. when the rivers flooded, the silt spread over the plains and made the soil in the river valleys fertile for farming.

the invasive species was introduced due to commercial purpouses, as there was a demand for fur clothes and hence, a business opportunity connected to this product. actually, it was when the nutrias scaped, causing harm to the us ecosystems when they acquired the status of invasive species. in this case they have caused an environmental problem, but it could have affected also economic interests or even human health.