Which of the following is the purpose of using an operational definition? multiple choice establishing an operational definition ensures that everyone agrees on what a variable means. research participant bias is increased when a study uses an operational definition. internal validity becomes unnecessary when a study has an established operational definition. experimenter bias is eliminated with the use of an operational definition.

An artist entered into a written agreement to sell a patron a partially finished painting once it was complete. the patron later learned that the artist planned to sell the painting to a third party who offered to pay the artist more than the contract price. the patron filed suit to compel the artist to sell the painting to her in accord with the terms of their agreement, while the artist denied that the painting the artist planned to sell to the third party was the subject of the agreement with the patron. at trial, the patron did not introduce the written agreement or explain its absence. rather, the patron sought to testify that, when she signed the agreement, the artist had pointed to the painting in question and stated that it was the patron’s painting. the artist’s attorney objected to the testimony that the artist identified the painting as belonging to the patron. how should the court rule? asustain the objection, because the artist’s statement was hearsay. bsustain the objection, because the patron failed to produce the written agreement or explain its absence. coverrule the objection, because the statement is not hearsay. doverrule the objection, because the statement was relevant.

Which member of the president's cabinet is most likely to negotiate a treaty with a foreign country? secretary of the interior secretary of the treasury secretary of defense secretary of state

Roman builders used rows of arches in there buildings to form a curved ceiling called what