Your eighty-three-year-old grandmother has been using a computer for some time now. as a way to keep in touch, you frequently send emails of a few lines to let her know about your day. she calls after every email to respond point by point, but she has never emailed a response back. this can be viewed as an example of:
cultural lag
innovation
ethnocentricity
xenophobia

The described situation can be viewed as an example of cultural lag.

Explanation:

Cultural lag is the transition period in which the intangible culture (including norms and laws) in a cultural system lags behind material culture (including technology).

In these situations, people often do not adapt to new technologies, thereby isolating themselves from them and not responding as expected to the stimuli they provide.

Cultural lag usually takes place with the elderly and technological advances, which do not usually know how to dominate and therefore incur communication errors.