Wow, I am so pleased with the responses. It took me a while to get back home today, but I was thinking about the topic all day long. Your responses and discussion are helping to sharpen the overall argument greatly.
First of all, let's define bias a bit more carefully, so we can distinguish "bias" from "preference". Many have commented that "bias" has a negative connotation, so let's try to fix that. Here is the relevant definition for the word bias from dictionary.com:
"a particular tendency or inclination, esp. one that prevents unprejudiced consideration of a question; prejudice."
In this case, we define bias as any psychological prejudice which influences the evaluation of the golf course. Previous experiences or present emotions that prevent pure objective analysis. A preference would indicate choosing between two or more types of previous experiences. As Wayne and Garth would say here, "OK! Let's move on!"
At this point, we can begin to throw out some of the proposed biases as actually preferences.
1. If George Pazin hates desert courses and I think parkland courses are a dime a dozen, that's our preference, and I should remove Style Bias from the list. This assumes that the evaluator has ample experience playing a wide variety of courses. A new course can be strange, and not necessarily good in golf.
I haven't played with George Pazin before, but through other posts, I think he is a mid-handicapper who actually hits it pretty far when he catches one. A very tough combination of skills to accommodate. No wonder he hates desert golf, since the limited turf acreage, with no trees to hold balls in play, makes the game demoralizing. George has every right to downgrade this course, based on his experience. To cite one of my recent threads and core ideas, "The golf course should accommodate that (shot or) golfer", and since it does not accommodate him well, the course is flawed.
It's awfully tough to eliminate Style Bias, because I want to include that experience where a player plays something totally different, and the player/evaluator has difficulty comprehending and appreciating the first round at the unique new course. If anything, uniqueness separates the best golf courses from the others.
2. Course conditioning is a preference. My tastes have changed with age, partly because agronomy practices have evolved. "Browwwn Acres is the place to be, fescue living is the life for me!" Not many players have experienced the wide variety of grasses many of us have seen. It's a great big world out there, TE Paul!
With that out of the way, let's list of biases in course evaluation. I'm not going to write "I believe" in front of every comment, so assume these are my observations, rather than the last word on the subject:
1. Regional or Hometown Bias
There is a weak but noticeable correlation between one's home town and his evaluation of local courses. Home is where the heart is.
2. Home Course or Repeat Play Bias
There is a very strong bias for the courses we play the most. Players love their home course, and a good golf course seems better and better with repeated rounds.
3. Architectural Pedigree Bias
My initial comments were to suggest the architect pedigree bias is often overstated here. Players come to a new course with a relatively open mind. Some of our guys would be jaded by the pedigree, others not so much. This can go both ways. Expectations get in the way of clear analysis.
4. Expectations or Reputation Bias
Having high or low expectations before a round can change one's opinion dramatically. If you really want to objective about things, it's best to keep those expectations in check somehow.
Hey Tom Huckaby, is Sand Hills your favorite course because you spent the whole day in awe thinking..."Gee, Christian Greco walked these same fairways as a young man."
5. Cost Bias
As Tom Huckaby and Richard Choi both mentioned, it has been proven that people enjoy expensive luxuries. Golf courses should be no exception, and I'm sure it clouds objectivity.
6. Remoteness Bias
Once again, Tom Huckaby has identified the exhiliration one can feel by traveling so far to play a course. This is very similar to expense bias. In the last couple years, I've has some very nice tournament rounds away from home. Deep down, I feel that I've traveled all this way for this special moment, and I'm going to make the best of it. I'm becoming a pretty good road golfer, perhaps only 1 point worse, index-wise.
7. Performance Bias
JWinick nominates Performance Bias. Did your play affect your opinion? There is likely a weak bias in favor of good play. Here are a few of my personal experiences, which influence my opinion whether this is a vaild consideration:
-- I played Plainfield about 3-4 years ago, and I was really tired that day. I shot an 87 and was kind of grumpy. Although I wasn't very complimentary at the time, it wasn't long before I realized how much I enjoyed the course, and would highly recommend Plainfield. The next day, I played Winged Foot West and played a little better. I hit one fairway but shot 80. Winged Foot West disappointed me, because I thought the front nine terrain was boring, and I didn't misread a putt all day long. I am pretty good friends with a member there, and hope to have a second crack at it. That's a course I think I'd like better the second time around.
-- I played Arcadia Bluffs last year. I birdied the first four holes (!) and shot 75, with seven birdies, my all time record. I think Arcadia Bluffs is good but not great, partly because I felt if I can get seven birdies the first time out, the course must be easy to figure out.
-- I've played San Francisco GC twice. The first time, about 4 years ago, I shot a 74 with a severe hangover, and thought that San Francisco was easy to decipher, and though it is an extremely impressive club and course, the course just didn't quite do it for me. The second time, about 4 months ago, I shot an 87 clean and sober, and thought San Franciscio was hard as hell, and though it is an extremely impressive club and course, the course just didn't quite do it for me.
8. Miscellaneous Factors
I'm sure people get biased negatively or positively due to their playing partners, the pace of play, and the service and amenities.