The accounts payable account is always increased on the (left/right) -hand side of the T account.

Which statement describes a monopoly? many firms produce identical products with no control over the market price. many firms produce differentiated products with control over market price. a single firm produces a product with no close substitutes and control over the market price. a single firm produces a product with many close substitutes and limited control over the market price.

Alyssa works for an engineering firm that has been hired to design and supervise the construction of a highway bridge over a major river. the bridge will be a unique design, incorporating complex designs that will likely never be duplicated. how should alyssa deal with designing and overseeing the building of the bridge?

Reliability and validity reliability and validity are two important considerations that must be made with any type of data collection. reliability refers to the ability to consistently produce a given result. in the context of psychological research, this would mean that any instruments or tools used to collect data do so in consistent, reproducible ways. unfortunately, being consistent in measurement does not necessarily mean that you have measured something correctly. to illustrate this concept, consider a kitchen scale that would be used to measure the weight of cereal that you eat in the morning. if the scale is not properly calibrated, it may consistently under- or overestimate the amount of cereal that’s being measured. while the scale is highly reliable in producing consistent results (e.g., the same amount of cereal poured onto the scale produces the same reading each time), those results are incorrect. this is where validity comes into play. validity refers to the extent to which a given instrument or tool accurately measures what it’s supposed to measure. while any valid measure is by necessity reliable, the reverse is not necessarily true. researchers strive to use instruments that are both highly reliable and valid.