Dick later wrote this about the story:
Here was my first story on the topic of: Am I a human? Or am I just programmed to believe I am human? When you consider that I wrote this back in 1953, it was, if I may say so, a pretty damn good new idea in sf. Of course, by now I’ve done it to death. But the theme still preoccupies me. It’s an important theme because it forces us to ask: What is a human? And — what isn’t.
Mind Webs was a 1970's series out of WHA Radio in Wisconsin that featured weekly short stories of science fiction by some of the genre's best writers. The music, sound cues and occasional character voices along with the performance of Michael Hansen, the reader, resulted in better than most fully dramatized productions of the period. Around 150 shows were aired between 1976 and 1984 varying in length, but most were about 30 minutes.
Mind Webs: Imposter - Philip K. Dick - 30:04