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Kobe's "hot hand"

 
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Does the 'hot hand' exist in basketball
Yes, 100% for sure
30%
 30%  [ 4 ]
Yes, but not as much as you would think
23%
 23%  [ 3 ]
Yes and No, depending on how it's defined
23%
 23%  [ 3 ]
No, not in the measurable sense; but maybe in some ethereal sense
7%
 7%  [ 1 ]
Absolutely not, it's been explicitly disproven
15%
 15%  [ 2 ]
Total Votes : 13

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Mike G



Joined: 14 Jan 2005
Posts: 3604
Location: Hendersonville, NC

PostPosted: Wed Dec 21, 2005 10:53 am    Post subject: Kobe's "hot hand" Reply with quote

In scoring 62 points (in 33 min.), Kobe made 18 of 31 shots from the floor (4 of 10 from the arc). This is perilously close to the zone that accepted 'hot hand' debunkers are unable to see anything 'hot' about a guy's shooting.

Counting 3's as 1.5 FG, Kobe made just about 2/3 of his shots (kindasorta). As I recall, the 'just say no to hot hands' folks like to lay out shot sequences, as hits or misses, and compare the likelihood of a hit, following a miss or a hit.

So a player making 2/3 of his shots could shoot in a sequence like this:

HMHHMHHMHHMHHMH...

At this point, he has 10 hits and 5 misses, exactly 2/3. But the proof that the player is 'not hot' lies in the fact that after a miss he shoots 100%, and after a hit he only shoots 50%.

Better not pass to this guy unless he has just missed a shot! The conclusion from such a shooting spell is that the shooter is showing an 'anti-hot-hand' bias.

Now, there may be further developments in this field. And if someone has kept up with the latest, I'd be interested in seeing an analysis of Kobe's shots, from play-by-plays. After all, Phil might need to make adjustments before the team starts to think they should 'get it to Kobe' , when he's like this.
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kjb



Joined: 03 Jan 2005
Posts: 865
Location: Washington, DC

PostPosted: Wed Dec 21, 2005 7:38 pm    Post subject: Reply with quote

Shoot, I had the hot hand a few weeks ago, and I'm old with creaky knees, a bad shoulder and carrying too much weight. "Hot hand" or "The Zone" exists whether we can figure out a way to measure it or not.
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Ed Küpfer



Joined: 30 Dec 2004
Posts: 786
Location: Toronto

PostPosted: Wed Dec 21, 2005 8:03 pm    Post subject: Reply with quote

WizardsKev wrote:
Shoot, I had the hot hand a few weeks ago, and I'm old with creaky knees, a bad shoulder and carrying too much weight. "Hot hand" or "The Zone" exists whether we can figure out a way to measure it or not.


"Hot hand," among people who study this stuff, usually means that a player's probability of hitting a shot is dependant on his past shots, or that his made shots are bunched up more than predicted by chance. It doesn't refer to the subjective feeling following made shots. This has been tested extensively, and the evidence for dependence and streakiness found wanting. This doesn't deny that the feeling exists (of course it does), nor does it positively deny that the actual hot hand exists. It merely suggests that evidence for the phenomemon is lacking.

Kobe's game, as far as I can tell, had nothing to do with the hot hand phenomenon. He shot 65% — pretty good, but you'd expect a great player like Kobe to have a game like that once or twice. His shot sequence
HMHHHHHHMHMMHHMHMMHMHHMHMHMMMHH
doesn't look streaky to me. A runs-test confirms its statistical non-significance, with a p values of 0.28 I would think that Tony Delk's 50 point game would be better evidence for hot hands, or even Kobe's 9 three-pointer game.
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Carlos



Joined: 21 Jan 2005
Posts: 64
Location: Montevideo, Uruguay

PostPosted: Wed Dec 21, 2005 9:14 pm    Post subject: Reply with quote

I have always been a bit puzzled by the "randomness" thing. After all, if a guy isn't shooting well, he probably will change his shot selection (or the point guard will not give him the ball). Or if a guy is having a good night, his teammates will try to get him the ball, right? What I mean is that the players and coaches are consciously trying to make it less random. Of course, the defense reacts to these things too, so maybe they even out in the end.
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Ed Küpfer



Joined: 30 Dec 2004
Posts: 786
Location: Toronto

PostPosted: Wed Dec 21, 2005 9:33 pm    Post subject: Reply with quote

Carlos wrote:
After all, if a guy isn't shooting well, he probably will change his shot selection (or the point guard will not give him the ball). Or if a guy is having a good night, his teammates will try to get him the ball, right?


Sure. But if there is no statistical evidence for hothandedness, the whole question of explaining the causes is rendered moot. Additionally, hot hands have been tested under more controlled conditions. One experiment tested free throw hot hands, whether a player was more likely to hit the FT following a made FT rather than a miss. Another had college players shooting jumpers from an arbitrary spot on the floor, placing bets on themselves if they would make the next shot. None of these showed evidence for hot handedness.
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HoopStudies



Joined: 30 Dec 2004
Posts: 705
Location: Near Philadelphia, PA

PostPosted: Thu Dec 22, 2005 11:01 am    Post subject: Reply with quote

Carlos wrote:
I have always been a bit puzzled by the "randomness" thing. After all, if a guy isn't shooting well, he probably will change his shot selection (or the point guard will not give him the ball). Or if a guy is having a good night, his teammates will try to get him the ball, right? What I mean is that the players and coaches are consciously trying to make it less random. Of course, the defense reacts to these things too, so maybe they even out in the end.


There was a recent paper done following this line of logic. Unpublished as yet, but I think they're submitting it. It suggests through much more math that the hot hand can exist and can't be disproven using the in-game FG sequence very well.

Ed points out that other more controlled tests have been done. Those didn't find widespread evidence of hot hands. There was some limited evidence that perhaps some individuals do get hot or cold.
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jmethven



Joined: 16 May 2005
Posts: 51

PostPosted: Thu Dec 22, 2005 10:54 pm    Post subject: Reply with quote

I hate to appear subjective, but I'm fairly certain that I, personally, tend to shoot in streaks when I play hoops in my driveway. What often happens is that I can get in a little rhythm, where I just repeat the same motion over and over, a motion that having once led to a made shot, continues to lead to more made shots. Does that qualify as a 'hot hand'?
Going on this topic further, I use a shooting drill where you start off by shooting jumpers close to the basket, and once you make one, you move back further, until you eventually get to the 3-point line. If you miss, you start back over. For me at least, it is much easier to make 3-pointers after running this drill, since it gets my body into the rhythm of a shooter. Maybe this isn't a 'hot hand' scenario per se, but I see a lot of similarities between it and the aforementioned free throw experiment.
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bchaikin



Joined: 27 Jan 2005
Posts: 689
Location: cleveland, ohio

PostPosted: Fri Dec 23, 2005 1:44 pm    Post subject: Reply with quote

i find it ironic that in phil jackson's book he constantly emphasizes the need for kobe bryant to be more of a team player (i.e. shoot less and look for his teammates more), then chastizes him on the few occasions he doesn't shoot enough (and the team loses), but now in 05-06 under the tutelage of jackson he is still getting pretty much the same high touches/min that he's gotten in the past but he is shooting the ball with a much higher percentage of his touches (and passing with a lower percentage) than ever before...
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Kevin Pelton
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Joined: 30 Dec 2004
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PostPosted: Fri Dec 23, 2005 2:09 pm    Post subject: Reply with quote

In the book he was playing with three Hall of Famers. Now, not so much.
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bchaikin



Joined: 27 Jan 2005
Posts: 689
Location: cleveland, ohio

PostPosted: Fri Dec 23, 2005 5:22 pm    Post subject: Reply with quote

In the book he was playing with three Hall of Famers. Now, not so much...

actually simulation shows that on that 03-04 lakers team if you replace payton with smush parker from 05-06 and malone with lamar odom 05-06 the team wins just as many games. the key difference is replacing shaq with chris mihm 05-06, where the 03-04 lakers then win 10-11 less games per average 82 game season...

i just wonder if in the games shaq missed in 03-04 (that bryant did not miss) if kobe bryant averaged 32/33 pts/g like he is now, or if for some reason jackson has changed his tune. bryant is now shooting more per touch than he ever has in his career, but has teammates with Scoring FG%s (combining 2pters, 3pters, and FTs) very similar to those in 03-04 (mihm at 54%, parker at 55%, odom at 53% compared to shaq at 56%, malone at 54%, and payton at 52%), and parker and odom have similar low rates of turnovers as did payton and malone. so its not like his current teammates are the gang that couldn't shoot straight - jackson is now either allowing him - or telling him - to shoot more, but in either case isn't telling him now to be "...more of a team player..."...

its quite a different scenario from the scathing things he said about bryant in his book....
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KD



Joined: 30 Jan 2005
Posts: 163

PostPosted: Fri Dec 23, 2005 10:55 pm    Post subject: Reply with quote

WizardsKev wrote:
Shoot, I had the hot hand a few weeks ago, and I'm old with creaky knees, a bad shoulder and carrying too much weight. "Hot hand" or "The Zone" exists whether we can figure out a way to measure it or not.


I actually bet that it could be measured, as the only reason the "hot hand" exists is because of muscle memory. When you shoot the ball the same, consistent, way -- potency results.

Whether it's slowing down game tape, or strapping some chucker up to an MRI machine, it probably can be charted. Having confidence in your shot, because of how you've done in the prior few minutes, doesn't result in improved touch; but it DOES mean you have faith in your usual mechanics. Throw in the muscle memory (honed because of the sheer amount of shots you've been putting up), and a hot hand is in the offing.

Everyone chalks it up to superstition, but there's a reason players don't like to walk off the court after a pre-game/pre-half shootaround without having made their last shot.
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Mike G



Joined: 14 Jan 2005
Posts: 3604
Location: Hendersonville, NC

PostPosted: Sat Dec 24, 2005 6:42 am    Post subject: Reply with quote

JMethven's exercise of hitting shots and continuing to hit while moving further out is a good one. I've seen Karl Malone do that against Duncan and Robinson in a playoff game.

Kobe Bryant's game of 1-7-03, in which he hit 9 straight 3-ptrs (and a record 12 for the game) had no evidence of a 'hot hand' as defined by Alan Reifman:

http://www.hs.ttu.edu/Hdfs3390/hh_kobe.htm

"..the nine consecutive hits from three-point range were not statistically noteworthy. "

In the article linked above, the 9 consecutive hits are treated as a single event: a single 'run' of hits; and the number of these 'runs' in that game (and in the latest Kobe-burst?) don't look 'hot', to Mr. Reifman.

The definition of 'hot hand' can be moved further and further from what seems reasonable to 100% of coaches, players, and basketball fans; and at each distance can be called 'statistically insignificant'.
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