The pur pose o f t he s tudy w as t o i nvestigate s equences of t ypical b each vol leyball actions to determine action patterns and anticipate athlete's behaviour. Videos from 18 games including 1645 action sequences consisting of 10918 actions from female World Tour at hletes w ere an alyzed. Single a ctions w ere r ecorded in a da ta ba se and probabilities of serve-reception, set-attacking, and reception-attacking action sequences were de termined b y m eans of da ta ba se que ries. C hi-square t ests w ere appl ied to determine significant patterns. Results did not reveal any superior t ype of serve which would create difficulties for the receiving team (p>0.05). The t ype of attack (smash or shot) did not significantly depend on the position of the setting. However, there was a tendency ( p= 0.054) t o ha rd a ttacks w hen t he ba ll w as pr eceded b y a s etting f ar a way from the net of from a lateral position near the side lines. The temporal position within a rally di d ne ither e ffect t he t ype nor t he qua lity of a ttack ( p>0.05). Contrariwise, t he quality o f t he pr eceding r eception di d i nfluence t he t ype ( p<0.01) a nd t he qua lity (p<0.05) of a ttack. F ollowing " good" r eceptions a thletes pr eferred ha rd a ttacks a nd were m ore effective c ompared to situation where t hey ha d "perfect" or "poor" receptions. A lthough de pendencies c ould not b e de tected i n a ll a nalyzed c ases t he analysis of beach volleyball action sequences even by simple means of probabilities is a promising method to determine tactical patterns in beach volleyball. INTRODUCTIONGame an alysis i n sport g ames ha s b ecome in creasingly impor tant f or pr actitioners during the last years. Professional sport clubs spend a significant amount of money in analyzing opponents for match preparation. Most approaches to s ystematic analysis of sport g ames r ely on not ational da ta ( Hughes & Franks, 2004 ) of ten r elated t o vi deo systems. In general, single act ions ar e as sessed and mapped to action va riables t o represent the mos t imp ortant a spects of the g ame. The r esult of s uch analyses i s a distribution of a ctions which m ay give valuable information a bout s trengths a nd shortcomings o f a thletes or t eams. A s pecific w eakness of such an approach is tha t it does not c onsider t he pl ayer's ( or oppone nt's) p rior actions which m ay influence t he observed action.

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In an effort to devise some simple method of testing the remaining monocular depth perception of individuals who have suffered the loss of vision of one eye, Pickard' devised the following simple apparatus and technic :The apparatus consists of a cork dinner-mat about eight inches in diameter, the front of which is covered with black velveteen. To this front surface are stuck thirty or any other convenient number of pins of varied length.These ranging from three inches to 2 inch in length. O n the head or blunt free end of each pin is affixed some sealing wax of different colors. These colors should be bright, therefore being easily distinguishable from one another. T h e pins actually used by Pickard were 6 yellow headed pins, 6 red, 6 green, 6 dark blue and 6 white, a total in all of thirty pins with colored heads. Each color was placed on the heads of pins of different length.Pickard's technic was as follows: He held the disc upright some two feet in front of the patient, who was given a full length lead pencil. Holding this pencil in his working hand (usually the right hand), the patient was told to touch all pins of a particular color, e.g., red, with the blunt end of the pencil. While doing this the patient was instructed to keep his head perfectly still. T h e test was then repeated with each of the other five colors. While the test was in progress the accurate number of good contacts for each color was noted and the totals were added together at the end of the test.Pickard found from testing a number of monocular patients who were able to carry on their vocations successfully that twenty-five correct contacts out of a possible thirty were usually obtained, and he took this figure as a standard. If the patient obtained this number it was assumed that his remaining depth perception was normal. To score a perfect contact the head of the pin must be hit fairly, a glancing blow did not count.It should be noted a t this point that as far as the patient is concerned, the test is a color test but to the examiner it is a depth perception test. If by chance the patient should be color blind, this really does not matter, as his hits and misses can be recorded as usual. Of course, no hint of the real object of the test can be given to the patient, otherwise the malingerer would score many intentional misses and the neurasthenic patient would reveal his neurasthenia rather than his depth perception.In his work, Pickard finds the real difficulty of those who have recently lost an eye is in the anterior-posterior dimension of depth perception. In the lateral and vertical angle dimensions the sensations from the external ocular muscles added to the movements of the images of the objects viewed over the retinal fields are sufficient guides. It is for this reason that the patient's head must not move in making the test, and also that the patient must move the pencil directly towards the pin head and not in towards it from one side or another. It could be varied by a greater variety in the length of the pins and in the kind...