Narrative:

I had just taken off from a touch and go on runway xx with my non-pilot girlfriend in the right seat. I had decided to bring her along to do some pattern work with me; and was making clear radio calls on my position in the traffic pattern. Upon turning crosswind; I heard a radio call from a piper cherokee in a thick foreign accent reporting on a 45 for the left downwind to runway xx. After hearing their call; I made my crosswind call; and began to look for the traffic. I turned onto downwind; still looking for the cherokee; and made my downwind call. At that time the cherokee [pilot] made a call that they were entering the downwind and had 'traffic in sight;' which I assumed was me. At that time I did not have them in sight and stopped looking; assuming that the cherokee [pilot] was maintaining separation with me. I reported midfield and heard the cherokee within seconds also report midfield. I had a sinking feeling that something was not right and began looking for the cherokee with my girlfriend's help. I couldn't see the cherokee to my right; left; or behind me. I looked up in the skylights and saw the cherokee approximately 50 feet above and slightly ahead of me descending. At that time I immediately descended and exited the pattern; briefly said some unfriendly but radio appropriate words to the cherokee; came back around and re-entered the pattern from a 45 for the left downwind to runway xx.I think the largest factor in the near-miss was my assumption that the cherokee did indeed have me in sight and would maintain separation with me; with other contributing factors including myself flying a high wing aircraft looking for low wing traffic above me; creating a situation where we were both in each other's blind spots. A lesser factor; in my opinion; was a language barrier between myself and the cherokee [pilot]. I suspect the cherokee [pilot] might not have fully understood what he was saying; which goes back into my bad assumption that the cherokee [pilot] indeed had me in sight and was maintaining separation. In the future I need to be more vigilant in the traffic pattern; especially at ZZZ which is a very busy GA airport. Most of my flying has been done at a bravo airport and traffic separation is the responsibility of ATC. I can also be more forward with my CTAF communication and ask the pilot if he indeed has me in sight and is maintaining proper separation.

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Original NASA ASRS Text

Title: C150 pilot reported a NMAC while in traffic pattern at a non-towered airport.

Narrative: I had just taken off from a touch and go on Runway XX with my non-pilot girlfriend in the right seat. I had decided to bring her along to do some pattern work with me; and was making clear radio calls on my position in the traffic pattern. Upon turning crosswind; I heard a radio call from a Piper Cherokee in a thick foreign accent reporting on a 45 for the left downwind to Runway XX. After hearing their call; I made my crosswind call; and began to look for the traffic. I turned onto downwind; still looking for the Cherokee; and made my downwind call. At that time the Cherokee [pilot] made a call that they were entering the downwind and had 'traffic in sight;' which I assumed was me. At that time I did not have them in sight and stopped looking; assuming that the Cherokee [pilot] was maintaining separation with me. I reported midfield and heard the Cherokee within seconds also report midfield. I had a sinking feeling that something was not right and began looking for the Cherokee with my girlfriend's help. I couldn't see the Cherokee to my right; left; or behind me. I looked up in the skylights and saw the Cherokee approximately 50 feet above and slightly ahead of me descending. At that time I immediately descended and exited the pattern; briefly said some unfriendly but radio appropriate words to the Cherokee; came back around and re-entered the pattern from a 45 for the left downwind to Runway XX.I think the largest factor in the near-miss was my assumption that the Cherokee did indeed have me in sight and would maintain separation with me; with other contributing factors including myself flying a high wing aircraft looking for low wing traffic above me; creating a situation where we were both in each other's blind spots. A lesser factor; in my opinion; was a language barrier between myself and the Cherokee [pilot]. I suspect the Cherokee [pilot] might not have fully understood what he was saying; which goes back into my bad assumption that the Cherokee [pilot] indeed had me in sight and was maintaining separation. In the future I need to be more vigilant in the traffic pattern; especially at ZZZ which is a very busy GA airport. Most of my flying has been done at a Bravo airport and traffic separation is the responsibility of ATC. I can also be more forward with my CTAF communication and ask the pilot if he indeed has me in sight and is maintaining proper separation.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.