Examine individual changes

'{{otheruses4|the ice hockey statistic|the band|+/- (band)|the symbol|Plus-minus sign}} '''Plus-minus''' is an [[ice hockey]] [[statistic]] that measures the team [[Goal (ice hockey)|goal]] [[differential (mathematics)|differential]] when a specific player is on the ice. Players' plus-minus stats have been tracked since 1968. They get increased by one every time their team scores an even strength or [[shorthanded]] goal while they are on the ice. Their plus-minus is decreased by one every time their team allows an even strength or shorthanded goal while they are on the ice (whether or not the net is empty does not matter for purposes of plus-minus).<ref>{{cite web |url=http://proicehockey.about.com/od/scoresandstat1/f/plus_minus.htm |publisher=About.Com |title=What is the "plus-minus" statistic and how is it calculated? |last=Fitzpatrick |first=Jamie }}</ref> The plus-minus is never affected when a [[Power play (sport)|power play]] goal is scored by either team. The statistic is sometimes called the ''plus-minus ratio'' even though it is a [[Subtraction|difference]], not a [[ratio]]. It is also sometimes referred to as ''plus-minus rating'' although this is inaccurate as well. For example, a skilled player could be placed on a line with other, less skilled players which may cause his/her plus-minus to be lower than usual even though the player's individual performance may be just as good as before (or perhaps even better). A player's plus-minus statistic can be calculated for a single game or for the season as a whole. For instance, if a player enters a game with a season total plus-minus of -8, then accumulates a statistic of +3 for a single game, the season total will change to a -5. Plus-minus is mainly used to measure [[Defenceman (ice hockey)|defenders]] and [[Forward (ice hockey)|forward]]s who play a defensive role since offensive forwards are better measured by scoring statistics such as [[Goal (ice hockey)|goal]]s and [[Assist (ice hockey)|assist]]s. It is directly affected by team performance, thus accurate comparisons can only be made by taking into consideration the defensive performances of the team as a whole. ==History== The [[Montreal Canadiens]] were the first team to track +/-, starting sometime in the 1950s. Other teams followed in the early 1960s, and the [[National Hockey League]] (NHL) started officially compiling the ratings in [[1967–68 NHL season|1968]]. [[Emile Francis]] is often credited with devising the system, but he only popularized and adapted the system in use by the Canadiens. Since [[1982–83 NHL season|1983]] the [[NHL Plus/Minus Award]] has been awarded to the NHL player with the highest plus-minus at the end of the [[regular season]]; since they log more even-strength ice time, the winners tend to be defensemen. The most prominent plus-minus winner was [[Boston Bruins]]' defenseman [[Bobby Orr]], who led the league six times (and whose defence partner [[Dallas Smith]] was the first league leader). [[Wayne Gretzky]] led the league four times, and [[Chris Pronger]] twice. [[Larry Robinson]], the career leader in plus-minus, only led the league once. [[Ray Bourque]], third on the all-time leaderboard, never led the league in plus-minus for a single season. In the [[2002–03 NHL season|2002–03 season]] [[Peter Forsberg]] and [[Milan Hejduk]] were both +52 for the season as members of a high-powered line with [[Alex Tanguay]]. Forsberg led the league in points (106) and Hedjuk in goals (50) on the way to their shared +/- title that year. THIS IS ALL FALSE! The NHL single game plus minus record is +10 held by [[Tom Bladon]] on Dec 11, 1977. ==Notables <ref>[http://www.lcshockey.com/feb06/072206.asp The Plus and Minus of Plus-Minus - LCS Hockey]</ref>== '''Top 3: Season high''' * [[Bobby Orr]], [[1970–71 NHL season|1970–71]], (+124) * [[Larry Robinson]], [[1976–77 NHL season|1976–77]], (+120) * [[Wayne Gretzky]], [[1984–85 NHL season|1984–85]], (+98) '''Top 5: Career high''' * [[Larry Robinson]], career, (+730) * [[Bobby Orr]], career, (+597) * [[Ray Bourque]], career, (+528) * [[Wayne Gretzky]], career, (+518) * [[Bobby Clarke]], career, (+506) '''Top 3: Season low''' * [[Bill Mikkelson]], [[1974–75 NHL season|1974–75]], (-82) * [[Jack Lynch (ice hockey)|Jack Lynch]], 1974–75, (-69) * [[Greg Joly]], 1974–75, (-68) ==Other uses== Although the stat was pioneered in the sport of hockey, it has found its way into use in other sports and areas of life. For instance, the [[NBA|NBA's]] [[Houston Rockets]] have begun to utilize a modified version of the stat, which has helped expose the unheralded effectiveness of light-scoring [[Shane Battier]].<ref name="battier">{{cite news |last=Lewis |first=Michael |url=http://www.nytimes.com/2009/02/15/magazine/15Battier-t.html |title=The No-Stats All-Star |publisher=The New York Times |date=2009-02-13}}</ref> The statistic has also found its way into the classroom, being used by [[law school]] deans to identify effective professors.<ref name="chen">[[Jim Chen]], [http://money-law.blogspot.com/2008/07/plusminus-and-problem-of-measuring.html Plus/minus and the problem of measuring ''Arschlochkeit''], Moneylaw, July 22, 2008</ref> ==References== {{reflist}} {{DEFAULTSORT:Plus-Minus}} [[Category:Ice hockey statistics]] [[Category:Ice hockey terminology]] [[da:Plus/minus]] [[de:Plus/Minus]] [[hr:Plus/Minus]] [[it:Plus/minus]] [[nl:Plus/minus]] [[ru:Плюс/минус (хоккей с шайбой)]] [[fi:Plus-miinus (jääkiekko)]]'