Robert Cornelius took a self-portrait on a daguerreotype in 1839, which is believed to be the first American portrait, but it wasn't until the 2000s that "selfie" became a word. It was the Oxford English Dictionary's word of the year in 2013. The gap between the first instance of self-portraiture by camera and the proliferation of the term "selfie" more than a century later is an (extreme) example of

Cultural lag  

Explanation:

 The cultural lag is the term which is used for the cultural idea or concept that the culture specifically taking a lots of time for the solving the various types of social issues and the innovation of the various types of technology that is caused by the lag.

 The main causes of the cultural lag is due to the technological advancement, cultural change in the society, globalization and change in the user needs.

According to the given question, the cultural lag is  basically explain the gap between the given instances based on the self-portraiture by the camera and the selfie.    

 Therefore, Cultural lag is the correct answer.

since learning about his learning patterns, logan has become very aware of the thoughts and feelings he experiences as he listens to the “internal chatter” of his patterns.