Table 3.
Item Selection and Weighting for Three Criterion-Keyed Scales Produced by Different SLT Algorithms
| EPI Item | EPI scale | SPCA 1 | SPCA 2 | Regularization | Boosting |
|---|---|---|---|---|---|
| Often longs for excitement | Extraversion | −0.33 | −0.07 | 0.04 | 0.1 |
| Often needs understanding friends to cheer up | Neuroticism | ||||
| Usually carefree | Extraversion | −0.04 | |||
| Finds it hard to take no for an answer | Neuroticism | ||||
| Does NOT stop and think things over before doing them | Extraversion | ||||
| If says will do something, always keeps promise even if inconvenient | Lie | ||||
| Mood often goes up and down | Neuroticism | ||||
| Generally does and says things quickly, without stopping to think | Extraversion | ||||
| Sometimes feels ‘just miserable’ for no good reason | Neuroticism | 0.01 | |||
| Would do almost anything for a dare | Extraversion | ||||
| Does NOT feel suddenly shy when wants to talk to attractive stranger | Extraversion | 0.18 | 0.37 | −0.11 | −0.18 |
| Does NOT once in a while lose temper and get angry | Lie | 0.17 | −0.05 | −0.25 | −0.21 |
| Often does things on the spur of the moment | Extraversion | ||||
| Often worries about things should not have done or said | Neuroticism | −0.34 | −0.25 | 0.01 | −0.03 |
| Does NOT prefer reading to meeting people | Extraversion | 0.00* | 0.1 | ||
| Feelings are rather easily hurt | Neuroticism | 0.05 | |||
| Likes going out a lot | Extraversion | ||||
| Occasionally has thoughts/ideas does not want others to know about | Lie | 0.39 | −0.05 | −0.01 | −0.02 |
| Sometimes bubbling over with energy and sometimes very sluggish | Neuroticism | −0.32 | −0.17 | 0.06 | 0.15 |
| Does NOT prefer to have a few, but special friends | Extraversion | ||||
| Daydreams a lot | Neuroticism | ||||
| When people shout at, shouts back | Extraversion | ||||
| Often troubled by feelings of guilt | Neuroticism | ||||
| All habits are good and desirable ones | Lie | 0.32 | −0.22 | −0.14 | −0.14 |
| Lets self go and enjoys self a lot at a lively party | Extraversion | 0.07 | |||
| Calls self tense or ‘highly-strung’ | Neuroticism | ||||
| Others think of as being very lively | Extraversion | ||||
| After doing something important, feels could have done better | Neuroticism | ||||
| NOT mostly quiet when with other people | Extraversion | −0.08 | 0.43 | 0.02 | 0.1 |
| Sometimes gossips | Lie | 0.29 | −0.18 | −0.14 | −0.16 |
| Ideas run through head so that cannot sleep | Neuroticism | 0.01 | |||
| Would rather NOT look up something wants to know in book than talk to someone about it | Extraversion | −0.06 | 0.18 | 0.09 | 0.15 |
| Gets palpitations or thumping in heart | Neuroticism | ||||
| Does NOT likes the kind of work needs to pay close attention to | Extraversion | ||||
| Gets attacks of shaking or trembling | Neuroticism | −0.07 | −0.09 | ||
| Always declares everything at customs, even if could not be found out | Lie | 0.22 | −0.28 | −0.11 | −0.17 |
| Does NOT hate being with a crowd that plays jokes on one another | Extraversion | ||||
| Is an irritable person | Neuroticism | ||||
| Likes doing things in which has to act quickly | Extraversion | ||||
| Worries about awful things that might happen | Neuroticism | ||||
| Is NOT slow and unhurried in way of movement | Extraversion | −0.07 | 0.21 | 0.31 | 0.36 |
| Has NOT ever been late for an appointment or work | Lie | 0.24 | −0.2 | −0.08 | −0.12 |
| Has many nightmares | Neuroticism | ||||
| Likes talking so much never misses chance of talking to stranger | Extraversion | −0.07 | −0.13 | ||
| Troubled by aches and pains | Neuroticism | −0.19 | −0.37 | −0.22 | −0.3 |
| Would be very unhappy if could not see lots of people most of time | Extraversion | −0.04 | |||
| Would call self a nervous person | Neuroticism | ||||
| Of all people known, NONE who definitely does not like | Lie | ||||
| Is fairly self-confident | Neuroticism | −0.07 | −0.17 | ||
| Is easily hurt when people find fault with | Neuroticism | ||||
| Does NOT find it hard to enjoy self at a lively party | Extraversion | ||||
| Is troubled with feelings of inferiority | Neuroticism | ||||
| Can easily get some life into a rather dull party | Extraversion | −0.00* | −0.12 | ||
| Does NOT sometimes talk about things knows nothing about | Lie | 0.26 | −0.21 | −0.05 | −0.12 |
| Worries about health | Neuroticism | −0.22 | −0.34 | −0.03 | −0.13 |
| Likes playing pranks on others | Extraversion | ||||
| Suffers from sleeplessness | Neuroticism | ||||
| Component weights | 1.54 | 1.49 |
Note. EPI = Eysenck Personality Inventory. Items are in order of appearance. SPCA = Supervised Principle Components, component 1 and 2. For SPCA, numbers are component loadings (and regression scoring coefficients for components), while “component weights” in bottom row reflect raw regression coefficients (log hazards) for the association between each component and -cause mortality over a 25-year span. For boosting and elastic net models, coefficients are log-hazards for all-cause mortality over a 25-year span. Blanks indicate that an item was not selected by a particular model for the final scale.
*
= item included in final model with coefficient <.01.