Attention is not just a psychological concept. It also:
a. is measurable through brain imaging.
b. is measurable through careful observation of clients.
c. is justified by the extensive research on microskills.
d. has become a foundation for person-center counseling.

Thermal expansion is an example of? a) mechanical weathering b) chemical weathering c) erosion d) molecular weathering

This graph shows the marginal cost of producing each additional pair of running shoe inserts .whoih pair of shoes had a marginal cost of $3.00?

What is the difference between an observational study and an​ experiment? choose the correct answer below. a. in an​ experiment, a treatment is applied to part of a population and responses are observed. in an observational​ study, a researcher measures characteristics of interest of a part of a population but does not change existing conditions. b. in an​ experiment, a treatment is applied to an entire population and responses are observed. in an observational​ study, a researcher measures characteristics of interest of an entire population but does not change existing conditions. c. in an​ experiment, a researcher measures characteristics of interest of a part of a population but does not change existing conditions. in an observational​ study, a treatment is applied to part of a population and responses are observed. d. in an​ experiment, a researcher measures characteristics of interest of an entire population but does not change existing conditions. in an observational​ study, a treatment is applied to an entire population and responses are observed.