since the hegiJlning of tlH~ project. Among the four files, the greatest
proport Lon of lecters returned for insufficient ilJJrcss were sent to
sightl'l's \~hos(' IHlIllC~', \~el'(, Jrmm from the Blue Book fi Ie. 'Iho proportion
of "no rl'ply" l~erscns is difficult to interpret, because it is impossible
to knO\\ hOI\ many letters \'Iere never receivcJ and how many were received
lut w'.mt unans\\'ered. Both ,',Hue Book and NICAP files have the: greatest
proportion of older sightings, which in part 'Lcounts for their relatively
poorer l'ate of rctur:.. The final sighter s;:l.Inple, on which the analyses
an: h(I~('J. ('ow;ists 01' :'1 ";,ghters form the I\~.I'_ daok fil'r, 28 from the
Nlt:.:il' file, .,1 from the Pl~l'SOllaJ. file, a/hI 14 1'''m th: Colorado inVl'sti-
g~ltiol\S file,
D. roJ.lcge Slll'V('y
l'ollL'l~c sun"ey davis
and tht' oth"r at \vcslir naJIIC!-l on the qllcstionlwi.rC!;, In order
t~, JiS.,;'o'.ll'agl' O1'C)l'% or i1'rt'sl'onsiblc llllswcrs, (A few students cho,;c
lwt to providL' their n,lnll'~;; one cla% was required hy its instructor to
330
since the hegiJl1\ing of the projco.:t. Among the four files, the ~;rcatest
prClpOl't lOll of le(ten~ retU,"lled for insufficient nJJrcss were sent tn
sightl'l'S who::;,' l\(lII1C~:, were J l'mvn from thc BIIW Book 1'110. 'lho proportion
of "no rl'ply" l'el"H'ns is difficult to illtel'])ret, bN~ause it is impossible
to kllOl" hOI, Inall:' letters I'Icrc never receiveJ and how many were reed ved
lLlt w~l1t unansl'cred. Both ,',\lue Book and NICAP files have the greatest
proportion of older siglltillgs, which in part ,_counts for their relatively
poorer rate of rctlll';L The final sighter sample, on whiell the analyses
aJ'e 11(1~l'J. "OIl:;iSI~ 01' :~,1 "glttei's I'orm the 1\;,1'. Ilook fil?, 2& from the
NIt:i\I' file, 31 1'1'0111 tltt> I'vl'sollHl file, i1lh1 141'i)m th: Colorado invr:sti-
gat iOI\:; I"i 10,
U. Col,lege SlI\''I'{')'
\'011,,!;(" sU'I":ey dilt" were obtaine'\ b(,t",oen II April and 13 ~lay EJ()8
from 12 rolle!,,-, s,,,nples, reprcscnt'ng 10 ::olle!;~s and universities. 'lhe
total numb"j' of ,;tmIents particil'atir.g j J1 the s;,rvey' is '719, The n[Jmes
of the institutions partirip,lting ard those in(li v iJuals \"ho assistcJ Ue,
in obtaining sub,iccu apJlc~lr in Appcnc.lx M, All hut three SDU),C8S
of respondents \\'L'l'C COLlI'!;(,'S in the hehavioral sciences; o'ae partidpating
cbss \,as in a physi~'al ~denl'(' uer'artment and two were specbl courses
ill flying ~au\:ers, OHe offeJ'l'cl at tIle Univel'si ty of Cali rorni a at lJavi s
and till' other CIt \ve:,l~'yall University, II uC'!H,:r.ption of the ",Jmplcs
apl'<'al's in Table '7, In this table, sl1l11ple !lumhor~ corresponci to the
order i 11 Ivh ich Cv1l1p lctcd 'Illes t 10llna i }'cs Wl!rC feel1 j veu i however, thp
l)ruel' of schools ill i\pJll'lldix M, referred to above1 , i~; a lphu})eti.',:fl I ,
~Io~t qm'stiolll1aires Iv('],(' filled out cllrill!: a class period by ~tudr:l1t~
prC's('llt 011 the day tilr, ljlll'stionnalfc I~as ndlllinistcrod. In II few cases,
\'(11untef'rs, r:ltl\f.'r than ('very stlluent present, pruviucJ tl1l' data, Tn
I\l()~t in~tan('es stude',lts IVl'fr not aware, until after thuy IwJ cumpleted
fiilin!; Ollt tIll' q\ll,':.;tiollll:Ii1'l', that tlie research was being ~1'0n:.;ol'LCd h~'
till' L()loj'ado pl'ojcd,
"ltl10I1~:h )!l'lllltJ, rather than intlividuu1 responses were uf illterest,
st\ldC'l1t~ hl'1'l' ,Iskc,\ to pl:JCl1 tlll'.ir nallles on the qllcstiolll,:ti,rC!;, In order
tl' UiS,"~ll'ag,' (lrch's;; 01' jrrt'spon:;itJie IIl1swcr:-;, (A few students cho~c
Iwt to p1'ovidl' their 1l,lnll'~;; one cla55 W:t~i rcqtlirc<! hy its i.nstrtlctor to
330