Below are 166 (rather interesting!) size-ordered correlations that I calculated on 870 people in the United States, who were recruited using our study recruitment platform, Positly.

All responses are self-reported by the study participants, mostly measured on a scale of 1-4 or 1-5, except those that suggest a different scale (e.g., number of minutes doing something, age, symptom scores, etc.)

Keep in mind that if A and B are correlated, it could be that A causes B, it could be that B causes A, or it could be that some third thing causes both A and B.

The number shown on each row is the correlation between the thing on the left of the “vs.” and the thing on the right of the “vs.”

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Huge correlations (~67% of variance explained)

0.82: depression symptom score (PHQ9) vs. anxiety symptom score (GAD7)
0.82: “Taking all things together, I am happy.” (1-5 scale) vs. “In general, I feel confident and positive about myself.” (1-5 scale)
0.75: “How religious do you consider yourself to be?” (0-5 scale) vs. “How spiritual do you consider yourself to be?” (0-5 scale)
0.75: satisfactionWithDatingOrRomanticLife vs. howWellTreatedByRomanticPartner
0.74: socialLiberalness vs. economicLiberalness
0.73: placeOfWorshipAffiliation vs. “How religious do you consider yourself to be?” (0-5 scale)
0.68: “In general, I feel confident and positive about myself.” (1-5 scale) vs. “How optimistic a person are you usually?” (-2 to 2 scale)
0.67: parentsHappyWhenYouWereGrowingUp vs. parentsTreatedWellWhenGrowingUp
0.67: videoGameMinutesPerDayWhenPlays vs. videoGamePlayingDaysPerWeek
0.60: howGoodLifeIsRelativeToExpectations vs. “I feel satisfied with what I am achieving in life.” (1-5 scale)
0.60: enoughMoneyToLiveComfortably vs. moreWealthyThanFriends
0.60: hoursWorkedOnWorkDays vs. daysWorkedPerWeek
0.58: takesAntidepressants vs. hasMentalHealthDiagnosis
0.57: satisfactionWithDatingOrRomanticLife vs. relationshipSeriousness
0.54: takesAntidepressants vs. seeingAMentalHealthProfessional
0.54: “How spiritual do you consider yourself to be?” (0-5 scale) vs. placeOfWorshipAffiliation
0.53: alcoholDaysDrinkingPerWeek vs. drinksPerTimeDrinking

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Large correlations (~25% of variance explained)

0.50: relationshipSeriousness vs. livesWithOtherPeople
0.49: conscientiousness (2-question big 5 scale) vs. howGoodIsWillpower
0.48: “Taking all things together, I am happy.” (1-5 scale) vs. satisfactionWithDatingOrRomanticLife
0.48: hasDepressiveDisorder vs. takesAntidepressants
0.48: enoughMoneyToLiveComfortably vs. howGoodLifeIsRelativeToExpectations
0.46: relationshipSeriousness vs. hasChildren
0.45: hasDepressiveDisorder vs. hasAnxietyDisorder
0.42: selfReportedHowGoodAtMathComparedToOthers vs. selfReportedIntelligence
0.41: howWellTreatedByRomanticPartner vs. “Taking all things together, I am happy.” (1-5 scale)
0.40: “In general, I feel confident and positive about myself.” (1-5 scale) vs. howGoodIsWillpower
0.40: incomeScore vs. enoughMoneyToLiveComfortably
0.38: age vs. hasBeenDivorced
0.38: howOftenReadsBlogs vs. howOftenReadsTheNews
0.38 : timesSexualActivityWithOtherPersonIn7Days vs. howWellTreatedByRomanticPartner
0.37: moreWealthyThanFriends vs. “I feel satisfied with what I am achieving in life.” (1-5 scale)
0.36: howGoodLifeIsRelativeToExpectations vs. howWellTreatedByRomanticPartner
0.36: hasChildren vs. age
0.36: “Taking all things together, I am happy.” (1-5 scale) vs. enoughMoneyToLiveComfortably
0.36: selfReportedIntelligence vs. selfReportedGoodLookingnessForAge
0.36: selfReportedGoodLookingnessForAge vs. “In general, I feel confident and positive about myself.” (1-5 scale)
0.35 : timesSexualActivityWithOtherPersonIn7Days vs. satisfactionWithDatingOrRomanticLife
0.35: parentsHappyWhenYouWereGrowingUp vs. “In general, I feel confident and positive about myself.” (1-5 scale)
0.34: selfReportedIntelligence vs. considersSelfLifelongLearner
0.34: exerciseDaysPerWeek vs. hoursOutsideWeekly
0.31: homeOwnershipLevel vs. age
0.31: seeingAMentalHealthProfessional vs. depression symptom score (PHQ9)

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Medium correlations (~9% of variance explained)

0.3: “Taking all things together, I am happy.” (1-5 scale) vs. numberOfCloseFriendsAndFamilyMembers
0.3: homeOwnershipLevel vs. enoughMoneyToLiveComfortably
0.3: depression symptom score (PHQ9) vs. takesAntidepressants
0.3: republican1DemocratNegative1 vs. “How religious do you consider yourself to be?” (0-5 scale)
0.29: earlyTechnologyAdopter vs. appsTheyDownloadedAndUseWeekly
0.28: restednessUponWakingAfterIdealHoursOfSleep vs. “I feel satisfied with what I am achieving in life.” (1-5 scale)
0.28: healthLevel vs. exerciseDaysPerWeek
0.28: healthLevel vs. moreWealthyThanFriends
0.27: educationScore vs. incomeScore
0.27: selfReportedGoodLookingnessForAge vs. moreWealthyThanFriends
0.27 : isChristian vs. republican1DemocratNegative1
0.27: hasAPet vs. isFemale
0.26: selfReportedIntelligence vs. selfReportedGoodnessAndMoralness
0.25: numberOfCloseFriendsAndFamilyMembers vs. “How optimistic a person are you usually?” (-2 to 2 scale)
0.24: “How spiritual do you consider yourself to be?” (0-5 scale) vs. age
0.23: age squared vs. “How spiritual do you consider yourself to be?” (0-5 scale)
0.23: smokeCigarettesFrequency vs. addictedToADrugOtherThanCaffeineOrNicotine
0.23: hoursWorkedOnWorkDays vs. positivenessOfFeelingsAboutJob
0.23: hasAPet vs. isWhite
0.22: selfReportedIntelligence vs. educationScore
0.22: anxiety symptom score (GAD7) vs. takesAntidepressants
0.22: depression symptom score (PHQ9) vs. debtsCannotPayLevel
0.22: “How optimistic a person are you usually?” (-2 to 2 scale) vs. parentsTreatedWellWhenGrowingUp
0.21: hoursPastMidnightGoesToSleep vs. videoGameMinutesPerDayWhenPlays
0.21: hoursOutsideWeekly vs. exerciseMinutesPerExerciseDay
0.21: satisfactionWithDatingOrRomanticLife vs. parentsHappyWhenYouWereGrowingUp
0.21: socialLiberalness vs. homosexuality
0.21 : isChristian vs. hasChildren

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Small correlations (~4% of variance explained)

0.2: howOftenReadsTheNews vs. considersSelfLifelongLearner
0.2: hoursPastMidnightGoesToSleep vs. depression symptom score (PHQ9)
0.2: earlyTechnologyAdopter vs. internetCapableSmartphone
0.2: howGoodIsWillpower vs. moreWealthyThanFriends
0.2: nightclubAttendance vs. timesSexualActivityWithOtherPersonIn7Days
0.2: daysPerWeekUsesTwitter vs. appsTheyDownloadedAndUseWeekly
0.2: “How spiritual do you consider yourself to be?” (0-5 scale) vs. republican1DemocratNegative1
0.2: enoughMoneyToLiveComfortably vs. positivenessOfFeelingsAboutJob
0.2: bookReadingDaysPerWeek vs. considersSelfLifelongLearner
0.19: daysPerWeekUsesFacebook vs. isFemale
0.19: bodyMassIndex vs. depression symptom score (PHQ9)
0.19: differenceBetweenAverageAndNeededSleepHours vs. “Taking all things together, I am happy.” (1-5 scale)
0.19: selfReportedGoodLookingnessForAge vs. exerciseMinutesPerExerciseDay
0.19: selfReportedIntelligence vs. earlyTechnologyAdopter
0.18: hasAPet vs. daysPerWeekUsesFacebook
0.18: howWellTreatedByRomanticPartner vs. parentsTreatedWellWhenGrowingUp
0.18: “How spiritual do you consider yourself to be?” (0-5 scale) vs. “How optimistic a person are you usually?” (-2 to 2 scale)
0.18: moreWealthyThanFriends vs. timesSexualActivityWithOtherPersonIn7Days
0.18: nightclubAttendance vs. drinksPerTimeDrinking
0.18: incomeScore vs. selfReportedGoodLookingnessForAge
0.17 : firedFromAJobInLast12Months vs. addictedToADrugOtherThanCaffeineOrNicotine
0.17: isFemale vs. “How spiritual do you consider yourself to be?” (0-5 scale)
0.17: numberOfCloseFriendsAndFamilyMembers vs. “How religious do you consider yourself to be?” (0-5 scale)
0.17: selfReportedHowGoodAtMathComparedToOthers vs. selfReportedGoodLookingnessForAge
0.17: educationScore vs. enoughMoneyToLiveComfortably
0.17: selfReportedIntelligence vs. moreWealthyThanFriends
0.17 : timesSexualActivityWithOtherPersonIn7Days vs. healthLevel
0.17: daysPerWeekSpeaksToFriends vs. numberOfCloseFriendsAndFamilyMembers
0.17: “How religious do you consider yourself to be?” (0-5 scale) vs. takingAllThingsTogetherIAmHAPPY
0.16: minutesOnComputerTypicalDay vs. hoursPastMidnightGoesToSleep
0.16: hasBeenDivorced vs. “How spiritual do you consider yourself to be?” (0-5 scale)
0.16 : timesSexualActivityWithOtherPersonIn7Days vs. selfReportedGoodLookingnessForAge
0.16: hoursOutsideWeekly vs. “How optimistic a person are you usually?” (-2 to 2 scale)
0.16: “How spiritual do you consider yourself to be?” (0-5 scale) vs. numberOfCloseFriendsAndFamilyMembers
0.16: educationScore vs. bookReadingDaysPerWeek
0.16: howGoodIsWillpower vs. positivenessOfFeelingsAboutJob
0.16: gotDivorcedInLastTwoYears vs. addictedToADrugOtherThanCaffeineOrNicotine
0.16: howOftenReadsTheNews vs. educationScore
0.16: hasChildren vs. hasAPet
0.16: differenceBetweenAverageAndNeededSleepHours vs. exerciseDaysPerWeek
0.16: bodyMassIndex vs. chronicMedicalConditionSeriousness

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Tiny correlation (~2% of variance explained)

0.15: anxiety symptom score (GAD7) vs. socialLiberalness
0.15: restednessUponWakingAfterIdealHoursOfSleep vs. positivenessOfFeelingsAboutJob
0.15: relationshipSeriousness vs. republican1DemocratNegative1
0.15: daysPerWeekSpeaksToFriends vs. howOftenReadsTheNews
0.15: alcoholDaysDrinkingPerWeek vs. smokeCigarettesFrequency
0.15: gotDivorcedInLastTwoYears vs. firedFromAJobInLast12Months
0.15: selfReportedGoodLookingnessForAge vs. satisfactionWithDatingOrRomanticLife
0.15: videoGameMinutesPerDayWhenPlays vs. bookReadingMinutesPerDayWhenRead
0.14: parentsHappyWhenYouWereGrowingUp vs. selfReportedGoodLookingnessForAge
0.14: isChristian vs. daysPerWeekUsesFacebook
0.14: considersSelfLifelongLearner vs. howOftenReadsBlogs
0.14: healthLevel vs. differenceBetweenAverageAndNeededSleepHours
0.14 : republican1DemocratNegative1 vs. homeOwnershipLevel
0.13: hasAPet vs. mentalIllnessInFamilyLevel
0.13: economicLiberalness vs. daysPerWeekUsesTwitter
0.13: economicLiberalness vs. hoursPastMidnightGoesToSleep
0.13: seeingAMentalHealthProfessional vs. gotDivorcedInLastTwoYears
0.13: videoGamePlayingDaysPerWeek vs. bodyMassIndex
0.13: “How spiritual do you consider yourself to be?” (0-5 scale) vs. physicalDisabilityLevel
0.12: bornInUS vs. hasAPet
0.12: howGoodIsWillpower vs. numberOfCloseFriendsAndFamilyMembers
0.12: howOftenReadsBlogs vs. educationScore
0.12: “How optimistic a person are you usually?” (-2 to 2 scale) vs. hasBeenDivorced
0.12: parentsTreatedWellWhenGrowingUp vs. “How religious do you consider yourself to be?” (0-5 scale)
0.12: urbannessOfLocation vs. economicLiberalness
0.12: isFemale vs. depression symptom score (PHQ9)
0.11: nightclubAttendance vs. selfReportedGoodLookingnessForAge
0.11: howOftenReadsTheNews vs. daysPerWeekUsesTwitter
0.11: worksMoreThanWouldLike vs. depression symptom score (PHQ9)
0.11: incomeScore vs. hasAPet
0.11: parentsHappyWhenYouWereGrowingUp vs. howGoodIsWillpower
0.11: isFemale vs. hasMentalHealthDiagnosis
0.11: hasAnxietyDisorder vs. hasAPet
0.11: usCitizen vs. isWhite
0.11: howOftenReadsBlogs vs. socialLiberalness
0.11 : firedFromAJobInLast12Months vs. nightclubAttendance
0.11: educationScore vs. appsTheyDownloadedAndUseWeekly

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Negligible correlations (~1% of variance explained)

0.10: videoGameMinutesPerDayWhenPlays vs. hasMentalHealthDiagnosis
0.09: Points (gad7) vs. smokeCigarettesFrequency
0.09: healthLevel vs. alcoholDaysDrinkingPerWeek
0.09: howOftenReadsTheNews vs. incomeScore
0.08: selfReportedHowGoodAtMathComparedToOthers vs. howOftenReadsTheNews
0.07: physicalDisabilityLevel vs. lookingForWork
0.07: isMidwestUSRegion vs. hasChildren
0.07: gotDivorcedInLastTwoY

This piece was first written on January 13, 2018, and first appeared on my website on July 30, 2025.