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Time Period and Birth Cohort Differences in Depressive Symptoms in the U.S., 1982–2013

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Abstract and Figures

Across four surveys (N = 6.9 million), Americans reported substantially higher levels of depressive symptoms, particularly somatic symptoms, in the 2000s–2010s compared to the 1980s–1990s. High school students in the 2010s (vs. the 1980s) reported more somatic symptoms (e.g., trouble sleeping, thinking, and remembering; shortness of breath) and were twice as likely to have seen a professional for mental issues. College students in recent years (vs. the 1980s) were more likely to report feeling overwhelmed and to believe they were below average in mental and physical health, but were less likely to say they felt depressed. Total Center for Epidemiological Studies Depression scores were higher among adults in 2000 (vs. 1988), especially somatic symptoms. Teens displayed less suicidal ideation in 2011 versus 1991 and were slightly less likely to commit suicide. Thus, more subtle symptoms of depression became more prevalent even as some overt indicators of depression became less prevalent.
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4+"2$'1"-3%G'$115'
e$+-(+7%65%D57%_(,$'-1(+7%?5%@57%!1$+B7%^5<J.57%S$A-(+7%Y5%e57%c%e$+-(+7%65%b5%P;==>Q5%
J.*+B$1%"+%/(E+1$H"+B%/$+-$'%/H"$+-%&'(,H$#1%*/'(11%8>%3$*'15%>,"9/--$")%&'>-?#0"&"@?B'
./-/%,#0'%)*'>,%#+$#/1'AF7%LL<R;5%
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&(&EH*-"(+F%C"1$+-*+BH"+B%*B$%*+)%/(.('-%$00$/-15%!"#$%&'>-?#0$%+,?'%)*'>-?#0$%+,$#'
DE$*/<$"&"@?1'FH7%9=><98I5%
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$#(-"(+*H%&'(,H$#1%"+%U+BH*+)F%D%/(#&*'"1(+%(0%-A(%+*-"(+*H%/(.('-1%-A$+-3%3$*'1%*&*'-5%
7"8,)%&'"9'=0$&*'>-?#0"&"@?'%)*'>-?#0$%+,?1'I27%::I<:9K5%
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&'$2*H$+/$%(0%#*N('%)$&'$11"(+%*+)%/(#(',")%1E,1-*+/$%E1$%)"1(')$'1%"+%-.$%4+"-$)%6-*-$1%
,$-A$$+%8998<899;%*+)%;==8<;==;5%:</,$#%)'7"8,)%&'"9'>-?#0$%+,?1'2JA7%;8K8<;8KR5%
%
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%)*'5/*$#$)/1'II7%8:98<89=K5%%
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I7%;:K<;9=5%
d(H)+$37%_5%C57%U/W$'-7%\5%D57%[*A-.('+$7%d57%c%!*3H('7%D5%^5%P;=8=Q5%J.*+B$1%"+%-.$%
&'$2*H$+/$%(0%#*N('%)$&'$11"(+%"+%*+%DE1-'*H"*+%/(##E+"-3%1*#&H$%,$-A$$+%899:%*+)%
;==:5%:8-+,%&$%)'%)*'4/6'K/%&%)*'7"8,)%&'"9'>-?#0$%+,?1'FF7%9=8<98=5%
d(()A"+7%_5%C5%P;==>Q5%!.$%&'$2*H$+/$%(0%&*+"/%*--*/W1%"+%-.$%4+"-$)%6-*-$1F%89:=%-(%
899I5%7"8,)%&'"9'=&$)$#%&'DE$*/<$"&"@?1'IJ7%98K<98L5%
dE$('BE"$2*7%_57%@*HH"+/W'()-7%J57%c%\'31-*H7%?5%[5%P;=88Q5%!'*N$/-('"$1%(0%C$&'$11"(+%
6$2$'"-3%"+%JH"+"/*H%!'"*H1%(0%CEH(a$-"+$F%f+1"B.-1%f+-(%D+-")$&'$11*+-%*+)%GH*/$,(%
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"+%"+)"2")E*H1%A"-.%)$&'$11"(+F%D%131-$#*-"/%'$2"$A5%7"8,)%&'"9':99/#+$L/'O$-",*/,-1'2FH7%8R<
;:5%
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0$#*H$%.*&&"+$115%7"8,)%&'"9'D#")"<$#'>-?#0"&"@?1'A37%RR><R::5%
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"+/'$*1"+B%&'$2*H$+/$5%7"8,)%&'"9':99/#+$L/'O$-",*/,-1'2FP7%;=I<;8K5%
[E+B7%J<f57%b"E7%J<]57%^*+B7%6<?57%?E*+B7%]<]5%P;=8=Q5%6(#*-"/%13#&-(#1F%D+%"#&('-*+-%
%
;R%
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*#(+B%(E-&*-"$+-1%A"-.%#*N('%)$&'$11"2$%)"1(')$'5%7"8,)%&'"9':99/#+$L/'O$-",*/,-1'23I1%8>K<
8K=5%
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2P+0T@,%*/'-8,L/?U7%8998<;=8=%uJ(#&E-$'%0"H$1%*+)%/()$,((Wv5%fJG6_;I>:;<2;5%D++%D',('7%
@fF%f+-$'<E+"2$'1"-3%J(+1('-"E#%0('%G(H"-"/*H%*+)%6(/"*H%_$1$*'/.5%
\*11$'7%!57%c%_3*+7%_5%@5%P899LQ5%YE'-.$'%$a*#"+"+B%-.$%D#$'"/*+%)'$*#F%C"00$'$+-"*H%
/(''$H*-$1%(0%"+-'"+1"/%*+)%$a-'"+1"/%B(*H15%>/,-")%&$+?'%)*'!"#$%&'>-?#0"&"@?'V8&&/+$)1'337%
;:=<;:R5%
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?(.+1(+7%e5!5%P;==:Q5%f+"-"*H%1$2$'"-3%*+)%*+-")$&'$11*+-%,$+$0"-1F%*%#$-*<*+*H31"1%(0%)*-*%
1E,#"--$)%-(%-.$%Y(()%*+)%C'EB%D)#"+"1-'*-"(+5%'>W"!'5/*7%I7%$KI5%
\H$'#*+7%d5%b57%c%^$"11#*+7%@5%@5%P89:9Q5%f+/'$*1"+B%'*-$1%(0%)$&'$11"(+5%7"8,)%&'"9'
+0/':</,$#%)'5/*$#%&':--"#$%+$")1'3J27%;;;9<;;>I5%
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'$2"$A5%7"8,)%&'"9':99/#+$L/'O$-",*/,-7%2IP7%8;=K<8;=:5%
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>-?#0"&"@?1'2P37%88=<8;=5%
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-.*-%/(+-'",E-$%-(%"#&('-*+-%&*-.A*31%*11(/"*-$)%A"-.%#*N('%)$&'$11"(+F%C"$-7%1H$$&7%*+)%
$a$'/"1$5%7"8,)%&'"9':99/#+$L/'O$-",*/,-1'2FN7%8;<;R5%
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;:%
@*/W$+l"$7%J5%657%U'"/W1(+7%?57%C$*+$7%Y57%c%^'"B.-7%@5%P;=8KQ5%J.*+B$1%"+%*--"-E)$1%
-(A*')%1$$W"+B%#$+-*H%.$*H-.%1$'2"/$1F%D%K=<3$*'%/'(11<-$#&('*H%#$-*<*+*H31"15%=&$)$#%&'
>-?#0"&"@?'./L$/61'AF7%99<8=L5%
@*'WE17%[5%_57%c%\"-*3*#*7%65%P;=8=Q5%JEH-E'$1%*+)%1$H2$1F%D%/3/H$%(0%#E-E*H%
/(+1-"-E-"(+5%>/,-E/#+$L/-'")'>-?#0"&"@$#%&'!#$/)#/1'I7%K;=<K>=5%
@*-.$'17%J5C57%c%b(+/*'7%C5%P;==LQ5%G'(N$/-"(+1%(0%BH(,*H%#('-*H"-3%*+)%,E')$+%(0%
)"1$*1$%0'(#%;==;%-(%;=>=5%>W"!'5/*'A7%;=88g;=>=5%
S$A1(#7%J5%_57%D'/.$'7%_5%G57%!'E#,$--*7%657%c%d(--$1#*+7%f5%f5%P;==>Q5%J.*+B$1%"+%
*)(H$1/$+-%'$1&(+1$%&*--$'+1%(+%-.$%@@GfV@@Gf<D%*/'(11%0(E'%)$/*)$15%7"8,)%&'"9'
>/,-")%&$+?':--/--</)+1'N27%RK<:K5%
TH01(+7%@57%c%@*'/E17%65%J5%P;==9Q5%S*-"(+*H%&*--$'+1%"+%*+-")$&'$11*+-%#$)"/*-"(+%
-'$*-#$+-5%:,#0$L/-'"9'M/)/,%&'>-?#0$%+,?1'JJ7%:K:<:IL5%
G*--$+7%65%e5%P;==>Q5%_$/*HH%,"*1%*+)%#*N('%)$&'$11"(+%H"0$-"#$%&'$2*H$+/$5%!"#$%&'
>-?#0$%+,?'%)*'DE$*/<$"&"@?1'AN7%;9=<;9L5%
G'*--7%b5%D57%e'()37%C5%?57%c%dE7%s5%P;=88Q5%D+-")$&'$11*+-%E1$%"+%&$'1(+1%*B$)%8;%*+)%
(2$'F%4+"-$)%6-*-$17%;==I<;==:5%4%+$")%&'=/)+/,'9",'C/%&+0'!+%+$-+$#-'O%+%'V,$/9'HJ7%T/-(,$'%
;=885%
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Q,/-0<%)B'Q",+?TR/%,'X,/)*-1'2YJJT3PPJ5%b(1%D+B$H$1F%["B.$'%U)E/*-"(+%_$1$*'/.%f+1-"-E-$5%
_$3+(H)17%?57%6-$A*'-7%@57%@*/C(+*H)7%_57%c%6"1/.(7%b5%P;==LQ5%[*2$%*)(H$1/$+-1%
,$/(#$%-((%*#,"-"(E1i%["B.%1/.((H%1$+"('1`%$)E/*-"(+*H%*+)%(//E&*-"(+*H%&H*+17%89RL%-(%
;===5%!"#$%&'>,";&/<-1'IA7%8:L<;=L5%
%
;9%
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c%_$B"$'7%C5%D5%P89:KQ5%b"0$-"#$%&'$2*H$+/$%(0%1&$/"0"/%&13/."*-'"/%)"1(')$'1%"+%-.'$$%1"-$15%
:,#0$L/-'"9'M/)/,%&'>-?#0$%+,?1'F27%9K9<9I:5%
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P;=88Q5%6(#*-"/V*00$/-"2$%13#&-(#17%,E-%+(-%/(B+"-"2$V*00$/-"2$%13#&-(#17%(0%)$&'$11"(+%
*0-$'%*/E-$%/*')"*/%13+)'(#$%*'$%*11(/"*-$)%A"-.%8;<#(+-.%*HH</*E1$%#('-*H"-35%7"8,)%&'"9'
:99/#+$L/'O$-",*/,-1'2A27%8I:<8L>5%
6/.*"$7%\5%^5%P89LIQ5%D%B$+$'*H%#()$H%0('%-.$%1-E)3%(0%)$2$H(&#$+-*H%&'(,H$#15%
>-?#0"&"@$#%&'V8&&/+$)7%JF7%9;<8=R5%'
6$H"B#*+7%@5%U5%G5%P89::Q5%e((#$'%,HE$15%>-?#0"&"@?'X"*%?1'331'I=<I>5%
6.*0$'7%D5%e5%P;==LQ5%@$-*<*+*H31"1%(0%-.$%0*/-('%1-'E/-E'$1%(0%0(E'%)$&'$11"(+%
nE$1-"(++*"'$1F%e$/W7%JU6<C7%[*#"H-(+7%*+)%wE+B5%7"8,)%&'"9'=&$)$#%&'>-?#0"&"@?1'J37%8;><
8KL5%
!A$+B$7%?5%@5%P;===Q5%!.$%*B$%(0%*+a"$-3i%e"'-.%/(.('-%/.*+B$%"+%*+a"$-3%*+)%
+$E'(-"/"1#7%89I;<899>5%7"8,)%&'"9'>/,-")%&$+?'%)*'!"#$%&'>-?#0"&"@?1'HY1%8==R<8=;85%%%
!A$+B$7%?5%@5%P;==LQ5%M/)/,%+$")'5/B'Z0?'X"*%?[-'R"8)@':</,$#%)-':,/'5",/'
=")9$*/)+1':--/,+$L/1'D)+$+&/*TT%)*'5",/'5$-/,%;&/'X0%)'DL/,'V/9",/G%S$A%]('WF%Y'$$%G'$115%%
!A$+B$7%?5%@57%J*#&,$HH7%^5%\57%c%d$+-"H$7%e5%P;=8;Q5%d$+$'*-"(+*H%"+/'$*1$1%"+%*B$+-"/%
1$H0<$2*HE*-"(+1%*#(+B%D#$'"/*+%/(HH$B$%1-E)$+-17%89LL<;==95%!/&9'%)*'(*/)+$+?1'227%K=9<
K;R5%%
!A$+B$7%?5%@57%d$+-"H$7%e57%C$^*HH7%J5%S57%@*7%C5%657%b*/$0"$H)7%\57%c%6/.E'-l7%C5%_5%P;=8=Q5%
e"'-.%/(.('-%"+/'$*1$1%"+%&13/.(&*-.(H(B3%*#(+B%3(E+B%D#$'"/*+17%89>:<;==RF%D%/'(11<
-$#&('*H%#$-*<*+*H31"1%(0%-.$%@@Gf5%=&$)$#%&'>-?#0"&"@?'./L$/61'AP7%8KI<8IK5%%
%
>=%
!A$+B$7%?5%@57%c%f#7%J5%P;==RQ5%J.*+B$1%"+%-.$%+$$)%0('%1(/"*H%*&&'(2*H7%89I:<;==85%
7"8,)%&'"9'./-/%,#0'$)'>/,-")%&$+?1'F27%8R8<8:95%%
!A$+B$7%?5%@57%c%S(H$+<[($W1$#*7%65%P;==;Q5%DB$7%B$+)$'7%'*/$7%1(/"($/(+(#"/%
1-*-E17%*+)%,"'-.%/(.('-%)"00$'$+/$1%(+%-.$%J."H)'$+`1%C$&'$11"(+%f+2$+-('3F%D%#$-*<
*+*H31"15%7"8,)%&'"9':;)",<%&'>-?#0"&"@?1'2221%IR:<I::5%%
^"/W'*#*'*-+$7%G5%?57%^$"11#*+7%@5%@57%b$*07%G5%?57%c%[(H0(')7%!5%_5%P89:9Q5%DB$7%&$'"()7%
*+)%/(.('-%$00$/-1%(+%-.$%'"1W%(0%#*N('%)$&'$11"(+F%_$1EH-1%0'(#%0"2$%4+"-$)%6-*-$1%
/(##E+"-"$15%7"8,)%&'"9'=&$)$#%&'DE$*/<$"&"@?1'F37%>>><>K>5%
%
%
>8%
Table 1: U.S. 12th graders’ physical and mental symptoms and treatment seeking, 1982-2012
1982-
84
1985-
89
1990-
94
1995-
99
2000-
04
2005-
09
2010-
12
d (82-
84 vs.
10-
12)
d (82-
84 vs.
05-
09)
Mental issues (index)
2.25
(1.14)
2.34
(1.18)
2.44
(1.25)
2.48
(1.32)
2.50
(1.36)
2.50
(1.38)
2.44
(1.39)
.15
.20
Trouble remembering things
1.65
(1.34)
1.75
(1.44)
1.87
(1.56)
1.99
(1.68)
2.12
(1.76)
2.10
(1.75)
2.05
(1.74)
.26
.29
Difficulty thinking or
concentrating
2.16
(1.59)
2.23
(1.64)
2.36
(1.72)
2.40
(1.77)
2.43
(1.81)
2.48
(1.84)
2.47
(1.88)
.18
.18
Trouble learning new things
1.63
(1.24)
1.68
(1.29)
1.75
(1.36)
1.73
(1.37)
1.74
(1.39)
1.76
(1.40)
1.75
(1.38)
.09
.10
Trouble sleeping
2.48
(1.67)
2.56
(1.76)
2.60
(1.81)
2.70
(1.91)
2.72
(1.92)
2.74
(1.95)
2.79
(2.03)
.17
.14
Trouble getting started in the
morning
3.35
(2.16)
3.52
(2.22)
3.62
(2.26)
3.60
(2.30)
3.51
(2.31)
3.40
(2.25)
3.20
(2.25)
-.07
.02
Breathing issues (index)
1.30
(.83)
1.36
(.92)
1.46
(1.06)
1.50
(1.11)
1.43
(1.02)
1.44
(1.01)
1.46
(1.04)
.17
.15
Shortness of breath when you
were not exercising
1.35
(1.04)
1.43
(1.13)
1.53
(1.27)
1.58
(1.33)
1.51
(1.22)
1.52
(1.24)
1.56
(1.27)
.18
.15
Wheezing or gasping
1.25
(.89)
1.30
(.98)
1.40
(1.12)
1.43
(1.15)
1.36
(1.06)
1.37
(1.05)
1.36
(1.05)
.10
.09
Physical ailments (index)
2.36
(1.03)
2.41
(1.06)
2.51
(1.10)
2.54
(1.12)
2.43
(1.09)
2.37
(1.09)
2.32
(1.08)
-.03
-.01
Headache
3.07
(1.57)
3.19
(1.60)
3.30
(1.64)
3.31
(1.64)
3.25
(1.68)
3.12
(1.69)
3.12
(1.69)
.03
.03
Sore throat or hoarse voice
2.53
(1.55)
2.55
(1.55)
2.59
(1.53)
2.59
(1.55)
2.52
(1.53)
2.43
(1.51)
2.36
(1.49)
-.11
-.06
Sinus congestion, runny nose,
sneezing
3.33
(1.86)
3.42
(1.88)
3.51
(1.85)
3.58
(1.86)
3.40
(1.89)
3.31
(1.86)
3.27
(1.88)
-.03
-.01
Coughing spells
2.11
(1.58)
2.14
(1.59)
2.26
(1.61)
2.31
(1.64)
2.20
(1.60)
2.14
(1.56)
2.07
(1.55)
-.03
.02
Chest cold
1.64
(1.26)
1.67
(1.29)
1.78
(1.36)
1.76
(1.34)
1.67
(1.26)
1.62
(1.22)
1.55
(1.17)
-.07
-.02
%
>;%
Coughing up phlegm or blood
1.47
(1.23)
1.52
(1.28)
1.67
(1.41)
1.72
(1.46)
1.60
(1.34)
1.58
(1.33)
1.56
(1.31)
.07
.08
Days stayed home because you
were not feeling well
1.76
(1.16)
1.77
(1.15)
1.77
(1.20)
1.78
(1.20)
1.77
(1.19)
1.79
(1.21)
1.76
(1.23)
.00
.03
Rating of relative physical
health
3.61
(1.00)
3.59
(1.03)
3.45
(1.06)
3.40
(1.04)
3.34
(1.07)
3.34
(1.07)
3.31
(1.10)
-.29
-.26
Visits to doctor or other
professional
Routine physical check-up
1.72
(.87)
1.71
(.85)
1.77
(.93)
1.81
(.94)
1.88
(.96)
1.89
(.95)
1.93
(.97)
.23
.19
% in the last 12 months
52%
52%
53%
56%
59%
60%
62%
Injury from fight, assault, or auto
accident
1.14
(.56)
1.16
(.63)
1.18
(.70)
1.16
(.65)
1.18
(.67)
1.15
(.61)
1.14
(.59)
.00
.02
% in the last 12 months
8.2%
8.8%
9.2%
8.7%
9.4%
8.3%
7.9%
Other accidental injury
1.34
(.84)
1.34
(.85)
1.34
(.87)
1.33
(.83)
1.36
(.92)
1.32
(.84)
1.34
(.89)
.01
-.02
% in the last 12 months
19%
19%
19%
17%
19%
17%
17%
Physical illness or symptom
1.74
(1.13)
1.75
(1.14)
1.79
(1.19)
1.84
(1.19)
1.83
(1.17)
1.79
(1.15)
1.79
(1.16)
.04
.04
% in the last 12 months
39%
40%
41%
43%
43%
41%
41%
Emotional or psychological
problem or symptom
1.11
(.59)
1.14
(.67)
1.14
(.67)
1.18
(.77)
1.18
(.74)
1.22
(.83)
1.23
(.85)
.17
.15
% in the last 12 months
4.3%
5.7%
5.7%
7.0%
8.0%
9.1%
9.3%
NOTE: All d’s .04 and above are significantly different at p < .05 or below.
%
>>%
Table 2: Entering college students’ self-reports of mental health issues, 1985-2013
1985-
89
1990-
94
1995-
99
2000-
04
2005-
09
2010-
13
d (85-
89 vs.
10-
13)
d (85-
89 vs.
05-
09)
20%
24%
29%
27%
28%
30%
.23
.17
9%
9%
9%
8%
7%
7%
-.09
-.09
39%
41%
43%
46%
45%
48%
.19
.13
37%
41%
42%
44%
44%
44%
.14
.14
NOTE: All d’s .02 and above are significantly different at p < .05 or below.
%
>K%
Table 3: Changes in depressive symptoms on the CES-D among adults in the Longitudinal Study of Generations,
1988-2000%
1988
2000
d
t
All 19 and older
Negative affect
9.60 (3.31)
10.01 (3.53)
.12
3.31***
Somatic symptoms
10.60 (3.28)
11.47 (3.51)
.26
7.06***
Positive affect
13.23 (2.77)
13.41 (2.56)
.07
1.85
Relations with others
2.40 (.84)
2.57 (.99)
.18
5.20***
CES-D total score
9.21 (8.07)
10.53 (8.69)
.16
4.25***
Felt depressed (Bradburn single
item)
31%
31%
.00
.00
Ages 30-39
Negative affect
9.99 (3.38)
10.36 (3.83)
.11
.94
Somatic symptoms
10.86 (3.43)
11.94 (4.19)
.30
2.53*
Positive affect
13.34 (2.50)
12.80 (2.70)
-.21
-1.94*
Relations with others
2.54 (.93)
2.70 (1.08)
.17
1.45
CES-D total score
9.84 (8.17)
12.11 (10.20)
.27
2.18*
Felt depressed (Bradburn single
item)
40%
33%
-.14
1.42
NOTES: 1. d = difference in terms of standard deviation
2. * = p < .05, ** = p < .01, *** = p < .001
%
>I%
Table 4: Suicidal ideation, suicide attempts, and suicide rates among U.S. 9th-12th graders, 1991-2011
1991-
94
1995-
99
2000-
04
2005-
09
2010-
11
d (91-
94 vs.
10-11)
d (91-
94 vs.
05-09)
Felt sad or hopeless for two or
more weeks
------
28%
29%
28%
29%
.00
-.02
Considered suicide
26%
21%
18%
15%
16%
-.25
-.29
Made a plan to commit suicide
19%
16%
16%
12%
13%
-.16
-.21
Attempted to commit suicide
8%
8%
9%
7%
8%
-.01
-.03
Medically treated after attempt
2%
3%
3%
2%
2%
.01
-.02
Actual suicide rate, 15-24 year
olds
.0134%
.0114%
.0100%
.0090%
.0105%
-.02
-.03
NOTE: All d’s .04 and above are significantly different at p < .05 or below. For the actual suicide rate, significance
testing was not performed as the rates include the entire population and not a sample.
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... These findings were further validated by a study conducted by Twenge [15], who found the reason for these age and gender differences between the different generations and showed significant generational differences in American birth cohorts [15]. The socalled generation of "Millennials" (born in the period ranging from 1982 to 1999) was more likely to express symptoms of depression than the generation of "Gen Xers" (born in the period ranging from 1961 to 1981). ...
... These findings were further validated by a study conducted by Twenge [15], who found the reason for these age and gender differences between the different generations and showed significant generational differences in American birth cohorts [15]. The socalled generation of "Millennials" (born in the period ranging from 1982 to 1999) was more likely to express symptoms of depression than the generation of "Gen Xers" (born in the period ranging from 1961 to 1981). ...
... The socalled generation of "Millennials" (born in the period ranging from 1982 to 1999) was more likely to express symptoms of depression than the generation of "Gen Xers" (born in the period ranging from 1961 to 1981). A possible reason for this consists in the constant changes in culture, as society has transformed considerably over the last few decades, with fundamental changes in relationships, technology, and medicine; this cultural shift has resulted in generational differences in personality traits, attitudes, and behaviors [15]. Another reason consists in the rising prevalence of digitalization and the use of social media, which may increase the prevalence of depression and anxiety [16]. ...
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... , 以致部分人失 去真实自我与奋斗意义, 甚至选择"躺平" (张自慧 等, 2022)。当然, 这可能并非中国特有的现象, 困 境(Cai et al., 2012;Deci & Ryan, 2000;Kasser, 2003;Twenge, 2000;Twenge, 2015; ...
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Individualism appears to have increased along with modernization and globalization, yet it is a great debate whether such a cultural shift fell in the value discrepancy between the independence-focused rational individualism and the interest-focused utilitarian individualism, especially in fast-changing societies like China. Based on expert interview, self-report survey, and open-question analysis (pilot study), the pilot study established a reliable and valid dictionary of rational individualism and utilitarian individualism, finding that rational (vs. utilitarian) individualism prevailed in responses to questions about rational individualism, and vice versa. Furthermore, based on word counting (Study 1) and word embedding (Study 2) analyses of Chinese version of Google Books Ngram (1980~2019), the present research was designed to test the effect of social change on rational individualism and utilitarian individualism. We hypothesized that (1) rational individualism decreased while utilitarian individualism increased from 1980 through 2019, and that (2) the semantic association between self and rational (vs. utilitarian) individualism decreased over the past 40 years. As expected, Study 1 revealed that the usage of rational individualism decreased, while that of utilitarian individualism increased over time; and via the single-target Word Embedding Association Test (WEAT), Study 2 revealed that the semantic similarity between the target words about self (e.g., I, self) and attribute words about rational (vs. utilitarian) individualism decreased over time. Taken together, the results demonstrate the cultural shift of the increase in utilitarian individualism and decrease in rational individualism over the past 40 years in China, whereas both rational enlightenment and utilitarian expansion serve as psychological drives in the development of modern societies. It was suggested that the value discrepancy of rational and utilitarian individualism should be seriously concerned, and that further work is needed on multiple selves, cultural evolution, and psychological function of the two types of individualism.
... Therefore, whereas these services make surveying easier and faster, the samples are likely less representative of a world reality, and while oversampling women may help promote women's health, other groups also warrant consideration. Building upon our work, future studies should also investigate underrepresented gender groups and sexual and racial/ethnic diversities (Brance et al., 2023) to help promote equity (Weersing et al., 2022), as well as other demographic variables of interest such as age generation differences (Twenge, 2011;Twenge, 2015). Finally, the ISS has general limitations that are described in the project's OSF page (https://osf. ...
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... These pandemic-related increases should also be considered within the context of well-established increases in prevalence of depression symptoms and disorder over the last century [41][42][43][44] with indication this increase is greatest in adolescence. In representative national surveys in the US the prevalence of past-year major depressive episode (MDE) increased by 7.7% from 2009 to 2019 [45]. ...
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... Mental health can be defined as a "state of mind characterized by emotional well-being, good behavioural adjustment, relative freedom from anxiety and disabling symptoms, and a capacity to establish constructive relationships and cope with the ordinary demands and stresses of life" (Association, 2023). Mental health can change throughout the life course, creating patterns that vary within and between individuals and across populations, times, and contexts (Prior, Jones & Manley, 2020;Twenge, 2015). Long-term patterns of individual changes in mental health generally include a good pattern, a poor pattern, and changing patterns, although variations by study exist (Bromberger et al., 2019;Engel et al., 2020;Lincoln & Takeuchi, 2010;Kuchibhatla et al., 2012;Holden, Ware & Lee, 2016;Paksarian et al., 2016). ...
... teenagers around the world have mental disorders (MD) [2]. Over the past few years, this number has grown even more [3], [4]. MD can be challenging not only for the individual who suffers from it but also for his family, friends, and the community as a whole. ...
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... As noted in the first section of this introduction, there is a body of research suggesting the health of young people within Western contexts is improving Twenge (2015) shows that American young people were more likely to report depressive symptoms, especially psychosomatic symptoms, between 2000 and 2010 (vs. 1980 and 1990) suggesting that this trend may be increasing. ...
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