![]() The authors display little awareness of recent developments in the field: there are few citations appearing since Broman and Speed ( 1999) that covered similar ground and came to similar conclusions. However, I do not think that the implied criticism is fair here. No doubt there is bad statistical practice in this field as in many others, and academic researchers certainly should not shy away from criticism where it is due. In emphasizing model selection, model comparison and simulation studies, as if they were novel ideas in the field, and drawing four pedestrian conclusions, they seem to me to condemn the field as a statistical backwater. The authors are prominent statisticians who, I believe, do not work principally in QTL mapping. However, my main complaint is with the paper's emphasis, summarized by the four ‘key points that wish to make in this paper’, listed at the start of Section 5. Given the recent interest in Bayesian methods for QTL mapping it would have been useful to examine them. I would have liked to have seen more attention paid to the multiple-QTL mapping method of Jansen ( 1994) rather than, or in addition to, composite interval mapping (CIM), since it attempts to tackle the ‘key problem with CIM’. I have no major quibble with the paper's analyses. There is not much new here for the general statistician and, as far as I could detect, there is also little of interest for the applied researcher. However, I did consult widely among statistical researchers who have worked in quantitative tract locus (QTL) mapping, and I found little enthusiasm for the paper. I have no special expertise in this area, and so the authors should feel more than usually free to ignore my own views. I shall try to do a better job in this written version, and to leave enough space I shall omit my introductory comments about the role of statisticians in bioinformatics. I extend my apologies to the authors that an unavoidable commitment arising unexpectedly in the 18 hours before the meeting robbed me of my final preparation, so that my comments at the meeting were poorly presented. Should the player drive to the side of the overplay, reverse pivot on the rear foot, so that you face him/her, and play normal defense.( Imperial College School of Medicine, London ) At that moment, should the player drive away from the overplay, simple play normal defense. ![]() Throughout, maintain your overplay position.Ī drive begins the moment the ball leaves the players hands. When he/she reacts by initiating a shot, close by executing a forward pop. For example, when your opponent initiates a drive, execute a backward pop to create some space. Until your opponent shoots, passes, or drives, adjust your defensive position by either forward or backward popping and by adjusting the location of your hands. Depending on a number of factors, such as the relative quickness of you and your opponent and of his/her skill level, you can vary the amount of overplay. In a normal overplay, your head is opposite the shoulder of your opponent, when he/she is square to the basket. Consequently, when an opponent has the ball in the right forward position, the defender will overplay to his/her right and to the opponent's left. When the ball is in a forward position, many teams will, for example, protect the middle. ![]() Farther, if the defender is slower, but not so far as to not to be able to challenge a shot.Įven before your opponent receives the pass, you should have decided which driving lane you are going to deny or protect. Arm's length is the normal distance between the defender and the player with the ball. To perform both sets of tasks you must make sure that both the distance between you and your opponent and your defensive stance are correct. While defending against the drive and shot, you should also try to make it difficult for him/her to execute an overhead penetrating pass. Second, you must defend against his/her shooting or driving. First, you must decide which driving lane you are going to deny. As an opponent who is playing a perimeter position is receiving a pass close enough to the basket to shoot or drive, you must be ready to perform a number of tasks.
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