(12-11-2021, 11:22 PM)akiddoc Wrote: You may not see it, but you put her at an academic disadvantage by putting her in Kindergarten at 4 yo. Every academic paper on the subject shows it.
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I wonder if those papers evaluate individuals, or just medians. I wonder about the difference between the academic median of the group versus the upper & lower academic abilities of the group. Every child should be treated as the unique individual they are. If a child is advanced academically for their age, for whatever reason, is it better to hold them back by putting them with weaker students just because they are the same age? Classes are boring; the students don't have to work to have good grades, so may develop bad habits. (Tragically, I know such a case.) Of course, there are many dimensions that children are developing at the same time: physical growth, athletic, social, responsibility, emotional, as well as academic.
If you put children into situations that they are unable to handle, then that is a bad choice. But, if they are able to thrive, then why hold them back? If the education in your community is slower than in another community, then an academically advanced child may be academically disadvantaged by staying in his age group.
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Getting back to athletics, when I grew up, your competition age was as of the day of the (last day of the) competition. One brother had a birthday the day before a standard event, so always had to compete against older kids. My birthday is in late spring, so I was usually among the youngest for my primarily summer-time swim competitions. (Gee, can I blame my limited success on that?) When I started Masters swimming, aging up every 5 years was when you all of a sudden got relatively better than your competition. For a few months, some nemesis would be in a different age-group (either they aged up before or after you). Later, FINA & USMS moved to using your age as of January 1. That provided a permanent advantage to those born late in the year relative to those born early in the year. I recognized that as unfortunate (but not what I'd call an injustice).
As for someone switching genders, I'd say it is unfortunate for someone like Lia Thomas that chose to make this transition if they are unable to continue their sport, but it is unfortunate to thousands of other female athletes to compete against her and her times.
Will Thomas had a good career in swimming. When he made the decision to change genders, he should have recognized that the future she would have an unfair advantage and should not have expected to take that advantage by competing as a female. IMO, the NCAA & FINA should make that their rule. Her having to compete with the men would be unfortunate for her, but not an injustice. Sad for her, but his decision.
Allowing for this kind of an advantage at an elite level (national championships, Olympic medals, world records, pro sport contracts) could lead to a strong financial incentive (millions of dollars) that might be the primary reason the next somewhat good male athlete changes genders and becomes a national or international-level female athlete.
Moreover, the individual athlete may not be making that decision by themselves in a vacuum.
Imagine the outcry if in the next Olympics or two, Russia or China or the US has many, many transgender athletes in swimming, tennis, basketball, volleyball, track & field, soccer, ...