appendix 1

APPENDIX 1 Comparison of the final (optimized) clusters for both samples on the level of items The following six tables show how much (dis)agreement there is between the results of PCO for sample 1 (the previous sample) and 2 (the recent sample). The original OCD questionnaire (version 1, 108 items) was combined with 15 items from the IDB (Kraaimaat & Van Dam-Baggen, 1976), a Dutch 32 items OCD-questionnaire, and 6 items from the WLS, a Dutch compulsive behavior style questionnaire of my own making, totaling 129 items. The revised questionnaire (version 2) counted 117 items. The version 1 item pool shared 111 items with version 2. These items were identical or almost identical. Sample 1: n = 39 primary OCD patients. Sample 2: 105 primary and comorbid OCD patients, mild cases included.

Table App1.1: Comparison optimized (final) clusters for both samples, cluster 1 (contamination anxiety) Questionn. Symp Item content version -tom False positive for both samples: 0 code False positive for previous sample only: 1 1 2 121 82 c1 I feel uncomfortable whenever I come into contact with my own bodily secretions, such as feces, urine, menstruation, even when this is only slightly. False positive for the recent sample only: 0 Hit for both samples: 12 (1 unshared item) 54 39 c1 I don't dare to touch many things and people because I am afraid to get contaminated with something dirty or intolerable. 58 42 c2 I don't dare to touch many things and people, because I am afraid that they will contaminate me with something dangerous. 5 3 c3 Being close to something dirty, the idea occurs to me that it has contaminated me or will contaminate me without my noticing it. 9 6 c3 When I look at something dirty, I get the feeling that it makes my face dirty. 13

10

c3

62

45

c3

66

49

c4

106

73

c4

x

74 107 82 86

1 50 x

After experiencing events that bother me a great deal, I feel dirty and will wash myself thoroughly. When I have touched things belonging to a certain person (e.g. father, partner, boss), I have a strong urge to wash my hands. I mostly wash my hands after touching things.

To remove the contamination of my hands, I wash them prolonged or very often., 115 c4 I always wash my hands before touching something which will be handled by someone else soon, even when I did not just visit the toilet, and even when my hands are not visibly greasy or dirty. 56 c5 I wash my hands in a fixed, peculiar way, otherwise I am not sure if I'm clean enough already. 75 c5 When washing my hands I count to a certain number, otherwise I find it difficult to stop. 59 c6 I often clean the door-handles, the banisters, etc., because many people touch them. 62 c7 I avoid a lot of areas and activities in order to run no risk of being contaminated and having to wash my hands prolonged. False negative for the recent sample only: 2 (+ 1 unshared) 1 h1 I often have the feeling that I have contaminated others, and things around me, with something dangerous or something dirty. 37 h1/h5 I am very much aware of the risk of contaminating other people with germs. That's why I wash myself that much and disinfect that much. 113 h5/h6 I do my utmost to prevent myself from contaminating other people with something terrible. False negative for the previous sample only: 0 Correspondence score = 26/30 = 87%

p

f IRCx ICCn nxt agr

r1 .49 a0 .13

.31 .27

4 2

r1 o1 r1 o1 r1 o1 r1 o1 r1 o1 r1 o1 r1 o1 r1 o1 r1 -

.74 .88 .76 .75 .74 .75 .50 .47 .63 .62 .64 .78 .72 .86 .88 .83 .77 -

.32 .42 .34 .48 .34 .44 .25 .23 .26 .31 .23 .31 .29 .44 .24 .49 .34 -

2 2 2 2 2 2 3 4 2 4 4 2 4 2 2 2 2

-

r1 o1 r1 1 o1 r1 1 o1 r1 1 o1

.66 .49 .50 .68 .58 .64 .68 .83

.40 .47 .33 .36 .41 .45 .25 .35

6 5 6 2 4 2 2 2

r1 o2 r1 2 o2 r1 2 -

.64 .49 .66 .59 .55 -

.48 .43 .53 .69 .40 -

2 2 2 1 2 -

1

1 1 1 1 1 1 1 1 1 1

2

0

2 2 2 2 2 2 2 2 ign 2 2 2 2

1 1 ign.

Qestionn. version: the item numbers in OCD questionnaire version 1 (original + added items) and version 2 (revised). (original 1-108; added: 109-129) Code = the letter refers to the cluster name, the number refers to the type of symptom within the cluster p = predicted cluster f = final cluster number (after optimization of the predicted cluster): r = for the recent sample and revised version; o = for the previous sample and original version; a = added item for the previous sample Red print: indicates prediction error IRCx = item-rest correlation with the cluster under inspection (here cluster 1), i.e., the predicted cluster of a false positive or hit, the final cluster of a false negative (≠ predicted cluster), and the item-cluster correlation of a non-clustered item. ICCn = the item-cluster correlation with the cluster mentioned in column nxt nxt = cluster number of the cluster that is a potential rival to the cluster under inspection: the final cluster of a false positive, the predicted cluster of a false negative, the cluster with the next highest ICC in case of a hit or a non-clustered item) agr = agreement score of the item (correspondence in clustering): 2 = hits on cl. 1 for both samples *) 1 or 1,5 = partial correspondence (i.e., reallocation somewhat arbitrary) 0 = no correspondence ign = ignored for the correspondence score because there was only one sample for this ietm, or because it was a F for both samples; of course, not ignored for the calculation of AP(it) and AP(ld). Correspondence score = total up agreement scores, divided by the maximal possible score for this cluster

*) Accidentally not applicable to cluster 1.

Table App1.2: Comparison optimalized (final) clusters for both samples, cluster 2 (fear of unwittingly harming people) Questionn. Sympversion tom code 1 2 76 100 h4

1

1

h1

50

37

h1

39

30

h3

34

93

h6

29

24

h1/2

17

14

h2

23

19

h2

19

16

h3

21

17

h3

72

54

h3

98

70

h3

108

74

h3

90

63

h4

26

21

h6

94

66

h6

79

88

pi5-08

37

57

38

94

41

29

pi5-08

pi6-14

pi5-06

Item False positive for both samples: 0 False positive for previous sample only: 1 Once in a while I check the papers or the news thoroughly to see if I have not unintentionally caused any accidents, fires or such somewhere. False positive for recent sample only: 4 I often have the feeling that I have contaminated others, and things around me, with something dangerous or something dirty. I am very much aware of the risk of contaminating other people with germs. That's why I wash myself that much and disinfect that much. The idea often occurs to me that indirectly I may be the cause of some harm happening to someone else. The idea often occurs to me that I might damage valuable properties of others. Therefore I always pay close attention that this will not happen. Hits for both samples: 11 I cannot help feeling that someone may stumble over a stone, or something like that,- if I was the last one who touched this stone. I often feel I carry fire with me, or something else which is dangerous, in consequence of which I may cause fire or other disasters at certain places. Sometimes the idea occurs to me that I may have left pins, thumbtacks, splinters and similar things at somebody's place. More than once the idea occurs to me that the gas-supply in the room of a house-mate has not been shut off completely, or that the stove is in no good condition so that this house-mate may be killed. I am often afraid that I haven't quite extinguished the matches or cigarettestubs which I have left somewhere, so that things may catch fire. At home, with one of my inmates, I feel an urge to check the fire, the gas (tap), the sockets, or whatever might be dangerous, to make sure that this person will not be harmed. I push aside glass and pebbles in the street, because, otherwise, they might hurt other people, which would be partly my fault. When I see a stone or something like that lying in the street, I often get the feeling somebody else may stumble over it and that it would my fault. In the street I often look behind me to check if I have caused accidents without noticing it. I am often afraid that somebody else may have an accident with the things I handled last. That is why I try to make sure that I'll leave these things free from danger and take pains to get them that way. I look out for dangerous objects in the street because I have to remove these to protect my fellow-man. False negative for the recent sample only: 3 At home I have to lock my front-door or the door of my workshop) with concentrated attention, and even then I have to check more than once, or prolonged, whether it has really been locked. At certain moments (e.g. before going to bed or going out) I cannot help thinking that things are wrong and may cause accidents. In such cases I have to check everything carefully. I always check doors, windows, taps, the heating, my clothes and so on, meticulously and/or several times, so that I feel that I leave things in good order. False negative for the recent sample + false positive for the previous one I have great difficulty in mailing a letter, delivering something, or doing something else that is irrevocable. False negative for the previous sample only: 0 Correspondence score = 24.5/38 = 64%

Legend, see Table App1.1

p

2

f IRCx ICCn nxt agr

r2 .46 o0 .33

.20 .18

1 4

0

r1 o2 r1 2 o2 r3 2 o2 r3 2 o2

.48 .43 .53 .69 .54 .84 .43 .41

.64 .49 .66 .59 .57 .45 .49 .39

2 1 2 1 3 1 32 3

r2 o2 r2 2 o2 r2 2 o2 r2 2 o2

.56 .61 .57 .59 .56 .68 .64 .69

.35 .41 .39 .36 .31 .33 .41 .51

1 1 3 1 3 1 3 3

r2 o2 r2 2 o2

.64 .52 .57 .68

.35 .14 .37 .42

3 1 3 1

r2 o2 r2 2 o2 r2 2 o2 r2 2 o2

.58 .69 .49 .77 .44 .66 .63 .77

.28 .34 .28 .29 .22 .21 .56 .40

1 3 1 3 1 1 3 1

r2 .48 o2 .70

.33 .21

1 1

r2 .60 5 o5 -.22

.30 .64

3 5

0

r2 .55 5 o5 .18

.36 .53

6 5

0

r2 .60 5 o5 -.33

.22 .70

6 5

0

r2 .48 o0 .08

.36 .18

5 5

2

2

2

2

2

5

0 0 1,5 1

2 2 2 2 2 2 2 2 2 2 2

ign

Table App1.3: Degree of agreement in clustering between previous and recent sample for cl. 3 (obsessions) Questionn. Symp- Item version tom False positive for both samples: 0 code False positive for previous sample only: 0 1 2 False positive for recent sample only: 4 12 9 o01 I am often afraid that what I've done or said was insufficiently sincere or insufficiently frank (e.g. a promise or confession), or insufficiently cordial. 68 51 o03/09 I spend lots of energy and time in carefully putting away knives, scissors and other sharp objects. 101 68 o06 When I have done or thought something bad (sinful), I feel compelled to execute a certain action or to say a special thing, in order to "wipe out" this bad thing. 45 34 o10 The idea often occurs to me that I may want to harm myself (e.g. suicide); this frightens me. Hits for both samples: 13 88 60 o00 I often have to fight against intrusive thoughts that I don't want. 92

105

o00

I often feel I can't control my thoughts.

16

13

o01

4

90

o01

7

5

o02

11

8

o03

27

22

o03

I feel guilty easily about the things I have done, even though I often don't know what could have been wrong about my behavior. I often consider the pros and cons of certain choices so long, that I get totally entangled in them and in the end have no idea anymore what to do. More than once the thought occurs to me, that I may very seriously harm a person who is important to me (for example: my partner, child, mother, father). More than once I feel a strong impulse (inclination) to attack, hurt (or even worse) a person important to me. When I see a knife or scissors I get a feeling of discomfort or fear.

15

12

33

26

64

47

47

35

3

27

103

72

25

92

p

f

r0 o3 r2 3 o3

IRCf ICC p

Legend, see Table App1.1

agr

.20 .67 .41 .54

.27 .25 .42 .42

4/5 4 3 2

3

r6 .41 o3 .57

.51 .28

6 2

1

3

r0 .32 o3 .64

.03 .23

4/5 4

0

r3 o3 r3 o3 r3 o3 r3 o3 r3 o3 r3 o3 r3 o3

.29 .24 .42 .19 .38 .44 .43 .27 .39 .25 .14 .36 .32 .04

6 2 6 2 5 4 5 2 1 2 6 4 2 1

.42 .41

2 4

2

6

2

3

3 3 3 3 3 3 3

.40 .59 .51 .39 .39 .60 .43 .40 .51 .67 .37 .51 .55 .37

I often get images in my head about bad things which could happen to others, r3 .60 e.g. being hit by a falling object, by pebbles or mud splashed up by a moving 3 o3 .78 car, being knocked down by-a car, etc. o05 When I have a malicious thought I am often afraid it will actually come true. r3 .66 3 o3 .74 o08 I have to check very often if everything is all-right with one or more of my chilr3 .49 3 dren, my parents, or my partner. o3 .49 o10 More than once strong impulses arise in me to do things that other people and r3 .42 3 I would find inadmissible. o3 .48 o11/00 I worry a great deal about death and serious illnesses. r3 .54 3 o3 .74 o11/00 I often worry about dangers besetting me, but if I think about them soberly I r3 .51 3 must admit: these dangers are, in fact, very unlikely. o3 .65 False negative for the recent sample only: 1 pi5-06 Many of the things I do give me the feeling that I may have done something r3 .47 quite stupid, without noticing it and as a result of which everything will go totally 5 o5 .51 wrong. False negative for the previous sample only: 0 Correspondence score: 28,5/36 = 79% o04

nxt

.32 .29 .42 .47 .11 .37 .23 .32 .42 .34 .40 .33

2 4 6 4 2 2 2 2 5 4

0 1,5

2 2 2 2 2 2 2

2 2 2 2

0

Table App1.4: Degree of agreement in clustering between previous and recent sample for cl. 4 (tidiness compulsion) p f ICC4 Questionn. Symp- Item content version tom code False positive for both samples: 0 1 2 False positive for previous sample only: 3 piI spend so much time on arranging or straightening things, that it is at the exr4 .65 51 38 01 4 pense of other things. o6 57 I oppose almost every change in my domain. r4 .57 99 71 03 4 o6 .31 I cannot bear it when belongings of mine and others get mixed up. I keep them r4 .55 128 112 03 4 well apart. a6 .34 False positive for recent sample only: 0 Hits for both samples: 14 piI spend much time on cleaning and brushing certain parts of my house or r4 .64 59 43 01 4 workroom, at the expense of other things that are important as well. o4 63 I clean rooms, furniture and the like when, strictly speaking, this is not r4 .66 114 79 01 4 necessary yet. a4 .56 I feel uncomfortable when I am hindered from performing my duties r4 .64 123 84 02 4 (household, office, factory etc.) in my set routine. *) a4 .50 I can't bear the mess made by my partner; I have to get rid of it. r4 .52 2 2 03 4 o4 .67 Unexpected events or visits can confuse me for an hour or longer. r4 .45 6 4 03 4 o4 .58 Rubbish around me oppresses me; it makes me tense. r4 .71 10 7 03 4 o4 .68 I often check attentively if my things have been moved, soiled or damaged: I r4 .58 63 46 03 4 can hardly stand this. o4 52 It often drives me crazy to see dust whirling on my things all day; I am often r4 .67 67 50 03 4 busy removing it. o4 72 I spend hours a week to remove bits of fluff, hairs etc. from my clothes. r4 .41 71 53 03 4 o4 66 When something has been used, I can't leave it for another minute. It has to be r4 .78 , 75 89 03 removed and cleaned or cleared away. (Sometimes at the annoyance of oth4 o4 74 ers). When I notice some lint or speck on something, I have to remove it first. r4 .64 113 78 03 4 a4 .53 I often feel that my performance of odd jobs at home/household dur4 .65 14 11 04 ties/professional tasks hasn't been good enough. I can't find myself at peace 4 o4 .59 with it, no matter how much I have done about it. 04 I can't sit still for even a -minute. All the time I see something which needs to r4 .55 18 15 4 05 be done. o4 .84 Once I have started something I can hardly stop; again and again I find somer4 .47 28 23 05 4 thing else which needs to be finished as well. o4 71 False negative for recent sample only: 0 False negative for previous sample only: 0 Degree of correspondence (agreement) = 29.5/34 = 87% Legend, see Table App1.1. *) Item 123 / 84 2: ICC with cluster 5 is .10 higher than with cluster 4 for sample 2.

ICCn nxt agr

.48 .55 .56 .48 .48 .40

5 1,5 6 5 0 6 5 0 6

.38 40 .24 .26 .74 .35 .17 .49 .53 .48 .34 .37 .49 51 .36 40 .30 46

1 1 5 5 5 5 5 3 5 6 5 3 5 6 1 5 5 5

.36 34

5 5

2

.36 .39

5 5

2

.55 .53

5 5

2

.34 .49 .42 73

5 5 5 5

2 2 2 2 2 2 2 2 2

2 2

Table App1.5: Degree of agreement in clustering between previous and recent sample for cl. 5 (precision compulsion) Questionn. SympItem content p f IRC5 version tom code 1 2 pi- False positive for both samples: 1 I have great difficulty in mailing a letter, delivering something, or doing something r2 .35 38 29 07 5 else that is irrevocable. o0 .18 False positive for previous sample only: 2 I often check the things I have written on revelations about myself which may have r5 .46 52 98 07 5 slipped out by accident. o6 .29 When I have to decide on something for which I do not have a set rule, I become r5 .42 117 110 13 5 extremely nervous. o6 -.02 pi- False positive for recent sample only: 7 Many of the things I do give me the feeling that I may have done something quite r3 .40 25 92 06 5 stupid, without noticing it and as a result of which everything will go totally wrong. o5 .49 At certain moments (e.g., before going to bed or going out) I am afraid that things r2 .32 37 94 08 5 are wrong and may cause accidents. Then, I have to check everything carefully. o5 .53 I always check doors, windows, taps, the heating, my clothes and so on, meticur2 .24 57 41 08 5 lously and/or several times, so that I feel that I leave things in good order. o5 .72 When, for example, I dress and undress, wash or bathe, I stick to a certain set rour6 .30 77 57 09 5 tine, from which I am not able to deviate. o5 .53 At home I have to lock my front-door (or workshop door) with close attention, and r2 .10 79 88 08 5 even then I have to check more than once, whether it has really been locked. o5 .64 When I am busy with my jobs in such a precise and forced way, it feels as though it r6 .26 20 91 10 5 is another person acting in me, and that it is not me. r5 .44 10 I make quite a ceremony of very ordinary activities. r6 .39 89 61 5 14 o5 .47 pi- Hits for both samples: 17 While performing certain jobs I often feel I have forgotten or skipped something. r5 .60 36 28 06 5 o5 .70 I often feel my activities are not yet completed, are still insufficient, though reason r5 .61 40 31 06 5 tells me they are sufficiently completed. o5 .79 I am not quite able to terminate my activities, I keep “sticking” to them. r5 .53 42 32 07 5 o5 .79 When I have finished a job, I always have to check the result. r5 .42 73 55 08 5 o5 .70 In my work (household, office, factory, etc.) I often fall behind because I repeat r5 .44 109 76 09 5 things. o5 .51 In my activities I often get so much entangled in details that I lose sight of the purr5 .61 24 20 10 5 pose and can't continue them. o5 .51 I can become quite tense during simple jobs, which has as a consequence that I r5 .52 32 25 10 5 am hardly able to continue. o5 .58 Certain parts of daily jobs I perform so precisely and concentrated that it is at the r5 .62 65 48 10 5 expense of other things. o5 .55 When I have to undertake a prolonged, intricate job, I can't help spending much r5 .64 91 64 10 5 time and attention to less important parts of it; in these I am very precise. o5 .67 I need quite some time for really rather simple activities such as: dressing, shaving, r5 .59 96 69 10 5 teeth brushing, making the beds, setting the table, writing out checks, small repairs. o5 .73 I lose time doing things more thorough than necessary, only because I want to r5 .52 116 80 10 5 make sure that it’s done all right. o5 .52 I perform my duties quite conscientiously; I am very thorough and precise. Too r5 .42 127 86 10 5 much, according to some. o5 .64 I keep my attention fixed quite concentrated on simple activities ( while performing r5 .61 69 52 11 them) such as undressing, dressing, brushing my teeth, shaving, odd jobs, writing 5 o5 .70 out checks etc., because otherwise I am afraid that I'll do something wrong. When, for example, I dress and undress, wash or bathe, I stick to a certain set r5 .60 110 77 13 5 routine, from which I am not able to deviate. o5 .38 When I am interrupted in a certain activity, I start all over again. r5 .55 122 83 13 5 a5 .47 I become confused when I am forced to do things differently from the way I am r5 .62 124 85 13 5 used to. o5 .59 When I spend less work on a job than usual, I feel that it cannot have been done r5 .59 129 87 13 5 well, even if the result is the same as usual. o5 .73 pi- False negative for recent sample only: 2 When I have to wait before I can go on with a job on which I was working, I am not r5 .55 22 18 19 6 able to do anything else in the meantime. o6 .51 Even during simple, ordinary, activities I am easily distracted by noises, other peor5 .56 44 33 19 6 ple, etc. I get very disturbed by it. o6 . 49 False negative for previous sample only: 0 Degree of correspondence (agreement) = 35 /56 = 63% Legend, see Table App1.1

ICCn nxt agr

.48 .12

2 6

.42 .40 .40 .19

3 6 3 3

.47 .32 .55 .47 .60 .39 .55 .61 .60 .40 .45 .38 .61 .38

3 4 2 4 2 6 6 6 2 6 6 4 6 6

.31 .61 .44 .66 .23 .56 .23 .55 .42 .41 .38 .46 .35 .43 .58 .51 .44 .55 .47 .59 .44 .35 .42 .45

6 4 4 4 6 6 2 4 6 6 6 6 6 4 4 6 4 6 6 6 4 4 4 4

.50 .57

6 6

.55 .28 .49 .37 .62 .60 .56 .66

4 6 6 6 4 6 4 4

.36 .72 .21 .67

4 6 6 6

ign

0 0

1 0 0 0 0 0 0

2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2

0 0

Table z: Degree of agreement in clustering between previous and recent sample for cl. 6 (disintegration syndrome) Questionn. Symp- Item content p f IRC6 ICCn nxt version tom False positive for both samples: 0 code False positive for previous sample only: 0 1 2 pi- False positive for recent sample only: 2 19 When I have to wait before I can go on with a job on which I was working, I am not r5 .36 .55 5 22 18 6 13 able to do anything else in the meantime. o6 .71 .53 4 Even during simple, ordinary, activities I am easily distracted by noises, other peor5 .21 .56 5 44 33 19 6 ple, etc. I get very disturbed by it. o6 .67 .49 5 Hits for both samples: 10 (+ 4 not shared items) I sharply attend to it that I perform my activities in a fixed manner. I grow very tense r6 .44 .53 5 55 40 14 and, more than once, start all over again when I suspect that I have deviated from 6 o6 .69 .45 5 my fixed manner. Certain activities I have to repeat several times, or do them in a very special, regur6 .56 .35 5 95 67 14 6 lated way, in order to feel that it has been done all-right. o6 .70 .67 5 There are certain – really quite ordinary - activities, in which I can totally lose x 116 17 6 r6 .51 .50 5 myself, against my wish I often feel that two successive activities stick together, flow into each other, are in19 r6 .56 .40 2 49 36 sufficiently separated. That is why I take special measures (e.g. checking; a cere6 20 o6 .75 .44 5 mony) in order to accentuate their separateness. These days I sometimes hesitate about really rather minor choices, such as: which 8 x 19 6 o6 .39 .33 4 socks shall I wear, or: which shoe shall I put on first, my right or my left one? Small events and things which have quite an ordinary meaning to everyone, but 18 r6 .53 .51 5 46 96 which have a strong meaning to me, will have as a consequence that I can't go on 6 19 o6 .42 .40 5 with a particular job or that I have to abandon it. x 114 20 I consider certain numbers or dates as "evil" or "inauspicious". 6 r6 .55 .28 3 x 117 20 I consider certain numbers as "good", or as "sacred". 6 r6 .63 .40 3 I feel inwardly compelled to name things around me. r6 .46 .37 5 43 95 20 6 o6 .57 .46 5 I often do something special (such as: counting, touching something, making a r6 .69 .32 2 93 65 20 6 noise saying "this is all-right", etc.) to be able to turn to the next one. o6 .74 .62 5 I feel an urge to count my steps or objects around me, or to perform other intensive r6 .40 .30 3 97 106 20 6 things, when I walk to some destination. o6 .52 .33 5 Nowadays my life is almost totally determined by my rules and habits. Without ther6 .46 .43 5 100 107 20 6 se I would not know what to do. o6 .47 .19 5 In order to feel assured that a certain event, a certain activity, will pass off well, I r6 .60 .29 3 104 108 20 6 feel an urge to make a particular gesture or to perform particular actions. o6 .61 .37 5 I count the acts that I repeat. r6 .66 .30 2 118 81 20 6 a6 .49 .36 5 False negative for recent sample only: 4 When I have done or thought something bad (sinful), I feel compelled to execute a r6 .51 .41 3 3 101 68 o06 certain action or to say a special thing, in order to "wipe out" this bad thing. o3 .03 .57 3 I repeat many of my actions still one or more times, otherwise I feel that it hasn't r6 .55 .30 5 77 57 09 6 been enough yet. o6 .56 .65 5 When I am busy with my jobs in such a precise and forced way, it feels as though it r6 .45 .30 3 20 91 10 5 is another person acting in me, and that it is not me. o5 .33 .43 5 I make quite a ceremony of very ordinary activities. r6 .61 .39 5 89 61 14 5 o5 .38 .47 5 False negative for previous sample only: 2 I oppose almost every change in my domain. r4 .18 .57 4 99 71 03 4 o6 .44 .30 5 I often check the things I have written on revelations about myself which may have r5 .21 .46 5 52 98 08 5 slipped out by accident. o6 .44 .30 5 Degree of correspondence (agreement) = 21/36 = 58% Legend, see Table App1.1

agr

0 0

2 2 ign 2 ign 2 ign ign 2 2 2 2 2 2

0 1 0 0

0 0