The EffĘcts of In Partial 3ėĄLfil1n€nt of Tle B€qüireûents for Eh ...

Bebaviôral variat¡j-lity,as irÊ1.1, as unifo¡nity,j-s accêpt€d
as lalrfu.I fünctions of aa act.iv€ biÕlogÌca1 systen.
ilith the rcre conplex behaviou¡a1 syst€rs, Halasz
enployed the cc¡cept of i,hè servoft€chanisn, A servonê-
chanisnì is a ccntrcl detj.ce chj_ch å.itjusts a passive
controll"ed €l-ên€n1: by neans ûf a sensor rhich ccnpar€s
the actual oütputlco¡diticn of the el-erne¡ìt ïith that ot
the dêBanä. Its actj-eity is actuat.ed by an error siqnal
forft€d at the summing fcLnt rhen comna¡d and feedback
j-nformation convêrge. Th€ r€l-€vð¡ce of a servonechanisur
nodel to the lenêrål prcbL€m of the stabilitï cf biolog-
ical forn ând fuÐction is at c¡cë ot¡vious. ft eriaTìle,s
the app.licaticn cf c4nc€Ft cf cclltrol to ¡euEological ,
physiolcgj.cal- and Fsyc hoi-o g ica L studies.
thê optimõl proc€ss control is aB êrtêns j.on of the
servomechasi-s ccnceptrirhich !ûalr he applied to thê .hoüe0-
stat j-c r€gü"Laticn in biclogy and bêhaviour. iû this
contert, th€ sensoartåe fe€èback ccnùro1 and tl¡€ denand
input are all stat:stric i¡ Eature. in the côn¡rentio¡¡al
servonecïarisn t ranercrkrth€ ccntroS-L€d elene¡t is â
passj-ve d€yice,but in the cpti$aL proc€ss cottro1 it cal
be âo {opêrating plartü cot:taining faedback locps ot a
1o¡rer ord.€r. th€ present authtr co¡siders t.hi-s mÐdel nost
attractiyê in th€ allalysis cf function aaå bêhavioür
rhich include i.xth€n thÈ r.neurcnal circi¡itsn as a sl-gni-
f,icant variable. i¡ this fra$ayo¡k, the sensor takês
statistic €anpl€s of th€ Ferfaxûarlce of the plant. an
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