A gentle note: this library is general education about how people tend to think, feel and get along. It is not diagnosis, therapy or treatment, and it can’t know your situation. Where the evidence is thin, mixed or debated, each entry says so.
People process the world differently: how much sensory input they can take, how they communicate, how they manage time and attention, when in the day they are at their best. The program treats these differences as information, not flaws. These entries explain the research and the community ideas behind that view, with honest notes on where terms are formal diagnoses and where they are community language. To sort your own reactions into lasting wiring, learned patterns and today’s conditions, and explain them to others, start with Know your own wiring.
How to read this page: entries summarize published research and name their sources. Notes marked This site’s idea are our own way of putting it into practice, not established science.
This site’s idea
Differences in wiring and the Five Pillars
Differences in wiring are Pillar IV, Tune how you send and receive. In you, it means knowing your own wiring, pace, senses and how you process the world. Between you, it means treating a mismatch as tuning rather than a moral failing, and translating across different neurotypes, energies and body clocks. Sensory and energy entries also draw on Pillar III, Read your state first.
The Five Pillars are this site’s own way of grouping these ideas, not a research finding. Each one borrows its name from a field. Here is what the pillars on this page mean, in you and between you and others:
I. See the whole load (borrowed from ledger accounting). In you: notice everything you carry, including the invisible, mental and emotional load. Between you and others: put it on one shared, fair page so nobody has to argue about whose work “counts”.
II. Fix the setup, not the person (borrowed from systems thinking). In you: see your habits and routines as a setup you can redesign, not a character flaw. Between you and others: use clear owners, handoffs and agreements instead of blame.
III. Read your state first (borrowed from nervous-system science). In you: know how full your battery is (calm and connected, revved up, or running on empty) before you judge a moment. Between you and others: pick the timing, pause and come back; your state shapes how the other person’s words land.
IV. Tune how you send and receive (borrowed from signal theory). In you: know your own wiring, pace and how you hear things. Between you and others: translate across different wiring and tone; a mismatch is tuning, not a moral failing.
The double empathy problem
Also known as: double empathy, autistic communication, mutual misunderstanding, Milton.
In a nutshell
The double empathy problem, described by autistic researcher Damian Milton, says that misunderstandings between autistic and non-autistic people run both ways. It isn’t that one side lacks empathy; each finds the other hard to read.
Going deeper
For decades, autism was described as a deficit in social understanding, as if autistic people alone struggled to read others. Milton pointed out that non-autistic people also misread autistic people, often badly. The difficulty lies in the gap between different ways of communicating and perceiving.
Supporting research found that autistic people often communicate effectively with each other, and that mixed pairs have more difficulty. Non-autistic people also tend to form quick negative first impressions of autistic people, based on differences in style rather than content.
This reframe has broad value. Any two people with different wiring, whether autistic and non-autistic, ADHD and not, sensitive and not, can struggle to read each other. The gap belongs to both, and so does the work of bridging it.
What the research says, and its limits
Milton published the idea in 2012. A 2020 study by Catherine Crompton and colleagues used a “diffusion chain” (passing information along a line of people) and found autistic-only chains passed information as effectively as non-autistic-only chains, while mixed chains lost more. Noah Sasson and colleagues (2017) found non-autistic observers formed less favorable first impressions of autistic people from brief clips. The research base is growing but still relatively young.
Also known as: neurodiversity, neurodivergent, neurotypical, neurotype, Judy Singer.
In a nutshell
Neurodiversity is the idea that variation in how human brains work is natural, like biodiversity. The neurodiversity paradigm treats conditions like autism and ADHD as differences with strengths and challenges, not only as disorders.
Going deeper
The term is usually credited to Australian sociologist Judy Singer in the late 1990s, and was popularised by journalist Harvey Blume. Autistic writers and activists developed it into a movement, with Nick Walker among those articulating the “neurodiversity paradigm.”
Common terms: neurodiverse describes a group with varied neurotypes; neurodivergent describes an individual whose brain works differently from the norm; neurotypical describes someone whose brain works in the typical way.
The paradigm doesn’t deny that people face real difficulties. It shifts attention to fit: many difficulties arise from environments built for one kind of brain. Changing the environment, such as clearer communication, quieter spaces or flexible schedules, can make as much difference as changing the person.
Some parents, clinicians and autistic people with high support needs have argued that the paradigm can underplay serious impairments. The conversation continues, and many people hold both views: difference is natural, and some people need significant support.
What the research says, and its limits
Singer’s honors thesis dates from 1998. The neurodiversity movement is a social and political movement as much as a scientific position. Research informed by it, such as the double empathy work and participatory research with autistic people, has grown substantially. The social model of disability, which it draws on, comes from disability studies.
Also known as: autism, autistic, ASD, autism spectrum, Asperger's, autistic adults.
In a nutshell
Autism is a lifelong neurodevelopmental difference affecting social communication, sensory processing and a preference for predictability and focused interests. It is very varied, and many autistic adults were identified late or not at all.
Going deeper
Current diagnostic manuals describe autism as involving differences in social communication and interaction, along with restricted or repetitive patterns of behavior, interests or activities, including sensory differences. Since 2013, previous labels such as Asperger’s syndrome have been folded into a single autism spectrum diagnosis in the DSM.
Autistic people often prefer direct communication, find unpredictable changes stressful, experience sensory input more or less intensely, and have deep interests. Many also have co-occurring traits or conditions, such as ADHD, anxiety or alexithymia.
In adulthood, autistic people may have learned to mask their traits to fit in, which can be exhausting. Late identification is common, particularly among women and people who didn’t fit older stereotypes. Many adults describe identification as bringing relief and a new way of understanding their past.
What the research says, and its limits
Autism diagnostic criteria are set out in DSM-5 (2013) and ICD-11. Research into adult autism, late diagnosis and autistic wellbeing has expanded rapidly, including participatory research that involves autistic people. Estimates of prevalence have risen over time, largely due to broader criteria and better recognition.
Also known as: monotropism, attention tunnel, deep focus, hyperfocus, special interests.
In a nutshell
Monotropism is a theory, developed by autistic researchers, that autistic minds tend to focus attention intensely on a few things at a time. It explains both deep interests and the difficulty of switching tasks.
Going deeper
Dinah Murray, Mike Lesser and Wenn Lawson proposed that attention works like a limited resource: some minds spread it across many things (polytropism), others concentrate it on a few (monotropism). A monotropic mind can go very deep into an interest, but switching away, or being interrupted, is costly.
This helps explain why being interrupted mid-task can be so distressing for some people, and why they might not hear a question asked while they are focused. It isn’t rudeness; attention is fully committed elsewhere.
Practical ideas: warnings before transitions (“in ten minutes can we talk?”), agreeing signals for interruptions, and respecting deep-focus time. These help people of any neurotype who find switching hard.
What the research says, and its limits
Murray, Lesser and Lawson published the theory in 2005. It has been influential in the autistic community and in participatory research, and a monotropism questionnaire has been developed more recently. It has less experimental testing than mainstream cognitive theories of autism, but it fits many autistic people’s descriptions of their experience.
Also known as: masking, camouflaging, hiding who you are, fitting in, autistic masking.
In a nutshell
Masking means hiding or suppressing natural traits to fit social expectations, like forcing eye contact or scripting conversations. It is common among autistic and ADHD people and is often exhausting.
Going deeper
Many neurodivergent people learn early that their natural way of being draws criticism. They adapt: copying others’ expressions, rehearsing small talk, suppressing movements that help them self-regulate. This can work in the moment, but it takes constant effort.
People who mask may seem fine at work or in company and then be completely drained at home. Partners sometimes see only the “after” and wonder why the energy runs out.
Having at least some places where masking isn’t needed seems to matter a great deal. Home is often the most important. Being able to drop the mask with a partner is a sign of trust, not of making less effort.
What the research says, and its limits
Laura Hull and colleagues published a qualitative study of autistic adults’ camouflaging in 2017 and developed the Camouflaging Autistic Traits Questionnaire in 2019. Studies have linked camouflaging with exhaustion and poorer mental health, though causation is hard to establish. Research on masking in ADHD is newer.
Also known as: ADHD, ADD, attention deficit, executive function, forgetfulness, distractibility, adult ADHD.
In a nutshell
ADHD is a neurodevelopmental difference involving attention regulation, impulsivity and, often, differences in executive function, such as planning, starting tasks and keeping track of time. It is not a lack of effort or caring.
Going deeper
The name suggests a deficit of attention, but many people with ADHD describe something different: difficulty directing attention where it is needed, alongside intense focus on things that interest them. Starting boring tasks, remembering appointments and estimating time can be genuinely hard.
Russell Barkley has argued that ADHD is fundamentally a difference in self-regulation and executive function, including how people sense time passing. Many adults describe “time blindness”: the future feels vague until it is suddenly now.
In households, ADHD often shows up in chores and planning: things are started and not finished, reminders are missed, mess builds unnoticed. The partner can end up as a manager and feel like a nag. External systems help both people: visible lists, reminders, clear ownership, routines, and breaking tasks into small steps.
What the research says, and its limits
ADHD is defined in DSM-5 and ICD-11, and is one of the most studied conditions in psychiatry. Barkley’s theory of ADHD as a disorder of behavioral inhibition and executive function was set out in 1997. Research supports differences in time perception on average, though “time blindness” is a popular description rather than a formal term. Emotional dysregulation is common in ADHD but not part of the formal criteria.
Also known as: rejection sensitivity, rejection sensitive dysphoria, RSD, fear of rejection, sensitive to criticism.
In a nutshell
Rejection sensitivity is a well-studied tendency to anxiously expect, readily notice and strongly react to rejection. “Rejection sensitive dysphoria” is a popular term, often linked to ADHD, but it isn’t a formal diagnosis.
Going deeper
Geraldine Downey and Scott Feldman described rejection sensitivity in 1996 as a pattern of anxiously expecting rejection, perceiving it readily in ambiguous situations, and reacting intensely. It is found across the general population and is linked with relationship difficulties.
“Rejection sensitive dysphoria” is a term used by some clinicians, notably William Dodson, to describe very intense emotional pain in response to perceived rejection or criticism, which many people with ADHD recognize. It isn’t in the diagnostic manuals, and research specifically on RSD is limited, although emotional dysregulation in ADHD is well studied.
Whatever the label, strong reactions to criticism are real and painful. Practical approaches include being clear and warm when giving feedback, checking interpretations before reacting, and agreeing in calm moments how to raise difficult things.
What the research says, and its limits
Downey and Feldman’s 1996 paper introduced the Rejection Sensitivity Questionnaire, and research since then is substantial. RSD, by contrast, has little direct research; it is best described as a clinical and community term. Research on emotional dysregulation in ADHD, including meta-analyses, supports that intense emotional reactions are more common in ADHD.
Highly sensitive people (sensory processing sensitivity)
Also known as: highly sensitive person, HSP, sensory processing sensitivity, sensitive, overstimulated, Aron.
In a nutshell
Sensory processing sensitivity is a personality trait described by Elaine and Arthur Aron, involving deeper processing of information, stronger emotional reactions and greater sensitivity to subtle stimuli. People high in it are often called highly sensitive people.
Going deeper
The Arons estimated that a substantial minority of people, often put at around 15 to 20 percent, are highly sensitive. Such people tend to notice subtle details, be moved by art and music, be affected by others’ moods, and become overwhelmed more easily by noise, crowds or busy schedules.
Sensitivity cuts both ways. Research on “differential susceptibility” suggests that sensitive people may be more affected by bad environments but also benefit more from good ones.
In a relationship, a sensitive partner may need more quiet time, find conflict more draining and pick up on tension sooner. A less sensitive partner may find this puzzling. Treating it as a difference in wiring rather than fragility makes compromise easier.
What the research says, and its limits
Elaine and Arthur Aron published the Highly Sensitive Person Scale in 1997. Jay Belsky and Michael Pluess developed differential susceptibility in 2009, and Pluess and colleagues’ 2018 work suggested people fall into roughly three groups of low, medium and high sensitivity. The trait is a personality dimension, not a diagnosis; it overlaps with neuroticism and introversion, and researchers continue to debate how distinct it is.
Also known as: sensory seeking, sensory avoiding, sensory processing, Winnie Dunn, sensory needs.
In a nutshell
Occupational therapist Winnie Dunn described how people differ in sensory thresholds and in how they respond: some seek sensation, some avoid it, some notice everything, and some miss things others notice.
Going deeper
Dunn’s model crosses two dimensions: threshold (does it take a lot or a little input to register?) and response (do you act to match it or go with it?). The result is four patterns: low registration (missing input), sensation seeking (looking for more), sensory sensitivity (noticing a lot) and sensation avoiding (limiting input).
Most people are a mix, and profiles can differ across senses. One person may seek loud music but avoid scratchy clothing.
In a shared home, sensory profiles can clash: one likes the TV on for background, the other finds it unbearable; one loves a busy kitchen, the other needs quiet. Naming these as sensory needs rather than preferences helps find practical solutions like headphones, separate spaces or agreed quiet times.
What the research says, and its limits
Dunn published her model in 1997, and her Sensory Profile questionnaires are widely used, especially with children and in autism research. The model has reasonable support as a descriptive framework, though the evidence for some sensory-based interventions is weaker.
Also known as: stimming, fidgeting, rocking, self-stimulatory behavior, fidget.
In a nutshell
Stimming means repetitive movements or sounds, like rocking, tapping, fidgeting or humming, that many people, especially autistic and ADHD people, use to regulate their senses and emotions.
Going deeper
Everyone stims a little: tapping a pen, bouncing a knee, twirling hair. For many neurodivergent people, stimming is more frequent and more important, helping them focus, calm down or express joy.
Historically, stimming was often treated as something to stop. Many autistic adults describe being told to sit still as children and the stress this caused. The current view in the autistic community, and increasingly among clinicians, is that harmless stimming should be allowed.
At home, understanding stimming as regulation rather than restlessness can reduce friction. If a particular stim bothers someone else (a noise, for example), a swap to a quieter one can be negotiated, the way any shared-space habit is.
What the research says, and its limits
Research on stimming from autistic perspectives, for example a 2019 qualitative study by Steven Kapp and colleagues, describes it as a coping and self-regulation mechanism. Research on fidgeting and attention in ADHD suggests movement may help some people concentrate. The evidence base is largely qualitative.
Also known as: autistic inertia, can't get started, stuck, task initiation, transitions, switching tasks.
In a nutshell
Many neurodivergent people describe inertia: difficulty starting, stopping or switching activities, even ones they want to do. It isn’t laziness; it is a real difference in how action is started and changed.
Going deeper
Autistic people often describe being “stuck” before starting a task, or unable to stop once engaged. People with ADHD describe difficulty initiating boring tasks. Both can look like procrastination or unwillingness from outside.
Transitions are especially hard: leaving the house, switching from work to family time, moving from one conversation to another. A request that seems small (“can you just quickly…”) can mean a costly switch.
Helpful supports include warnings before transitions, visual schedules, body-doubling (doing a task alongside someone), and starting with a tiny first step. Understanding inertia as a real phenomenon, not a choice, reduces a lot of frustration.
What the research says, and its limits
Autistic inertia is primarily a community term. A 2021 study by Karen Buckle and colleagues was among the first to explore it formally, based on autistic adults’ accounts. Research on task-switching costs in general cognitive psychology, and on executive function in autism and ADHD, supports that switching can be effortful. Body-doubling is widely reported to help but is not well researched.
Also known as: personality, Big Five, OCEAN, openness, conscientiousness, extraversion, agreeableness, neuroticism, MBTI.
In a nutshell
The Big Five is the most widely supported model of personality: openness, conscientiousness, extraversion, agreeableness and neuroticism (emotional sensitivity). Each is a spectrum, not a type.
Going deeper
Openness describes curiosity and enjoyment of new ideas. Conscientiousness covers organization and follow-through. Extraversion is about sociability and energy from company. Agreeableness is warmth and cooperation. Neuroticism, sometimes called emotional stability in reverse, is the tendency to feel negative emotions strongly.
Differences in these traits explain many household frictions. A highly conscientious person may find a less conscientious partner’s approach stressful; an extravert may want more social plans than an introvert. Neither is wrong.
Personality tends to shift gradually across life, typically becoming more conscientious, more agreeable and more emotionally stable with age. It is also partly situational: people behave differently at work and home.
Popular type tests, like the Myers–Briggs, sort people into boxes. Research suggests personality is better described with continuous dimensions, and type tests have weaker reliability.
What the research says, and its limits
The Big Five emerged from lexical research by Lewis Goldberg and others, and from questionnaire research by Robert McCrae and Paul Costa, from the 1980s. Brent Roberts and colleagues’ 2006 meta-analysis showed average personality change across adulthood. The MBTI is widely used in workplaces but has been criticized for test–retest reliability and for forcing continuous traits into types.
Also known as: introvert, extravert, extrovert, social battery, needing alone time, recharging.
In a nutshell
Introversion and extraversion describe how people tend to respond to social stimulation. Extraverts often feel energized by company; introverts often need quiet to recharge. Most people are somewhere in between.
Going deeper
Introversion isn’t shyness (which is about social anxiety) or dislike of people. Introverts can enjoy company very much and still need time alone afterward.
In relationships, differences can be misread. An extravert may feel rejected when an introvert partner wants a quiet evening; the introvert may feel pressured by a full social calendar. Agreeing on a rhythm, such as some evenings in, some out, and recovery time after big events, helps.
Interestingly, research suggests that most people, including introverts, often feel good when acting in more extraverted ways, at least in the short term. But constantly acting against type can be tiring, which fits many introverts’ experience.
What the research says, and its limits
Extraversion is one of the Big Five traits and one of the most studied. Susan Cain’s Quiet (2012) popularised introversion. William Fleeson and colleagues’ research (for example 2002) found that acting extraverted was associated with positive feelings for most people. Later work found that sustained extraverted behavior can be tiring for introverts.
Also known as: chronotype, morning person, night owl, lark, social jetlag, body clock.
In a nutshell
Chronotype is your natural preference for when to sleep and when you are most alert. People really do differ, partly for biological reasons, and mismatched chronotypes can make shared schedules tricky.
Going deeper
Some people are naturally alert early and sleepy early; others come alive in the evening. These preferences are partly genetic and change with age: teenagers tend to be later types; older adults tend to be earlier.
Social jetlag describes the mismatch between a person’s body clock and their schedule. Night owls forced into early starts can feel chronically short of sleep.
In a household, chronotype affects when conversations go well. A morning person may raise topics at breakfast when the night owl is barely awake; the night owl may want to talk at eleven when the morning person is fading. Agreeing on good talking times is a simple, kind adjustment.
What the research says, and its limits
The Morningness–Eveningness Questionnaire was developed by James Horne and Olov Östberg in 1976. Till Roenneberg and colleagues introduced social jetlag in 2006 (with Marc Wittmann). Research supports genetic contributions to chronotype and links social jetlag with poorer wellbeing, though causal direction is still studied.
Also known as: uncertainty, need for certainty, not knowing, worry, anxiety about plans, changes of plan.
In a nutshell
Intolerance of uncertainty is a tendency to find not knowing especially distressing. It is linked with worry and anxiety, and it helps explain why sudden changes of plan can hit some people much harder than others.
Going deeper
Some people shrug off an unexpected change: “okay, we’ll go tomorrow instead.” For others, uncertainty feels deeply uncomfortable, and they may ask lots of questions, want firm plans or feel unsettled for hours.
Intolerance of uncertainty is common in anxiety, OCD and autism, though it is a spectrum in the general population too. It isn’t about control for its own sake; it is about reducing a genuinely unpleasant feeling.
Practical support can include sharing plans early, giving warnings before changes, being clear about what is known and unknown, and agreeing a default when plans are uncertain. For the person themselves, gradually practicing tolerating small uncertainties is a common therapeutic approach.
What the research says, and its limits
Michel Dugas, Mark Freeston and Robert Ladouceur developed the concept in the 1990s, initially in research on generalized anxiety. Nicholas Carleton (2016) argued it is a fundamental fear across many anxiety-related conditions. Studies link it to autism too, and some researchers suggest it may explain part of the link between autism and anxiety.
Also known as: spoon theory, spoons, spoonie, energy accounting, limited energy.
In a nutshell
Spoon theory is a metaphor, written by Christine Miserandino, for living with limited daily energy. Each activity costs spoons, and when they run out, they run out. Many people with chronic illness or neurodivergence find it useful.
Going deeper
Miserandino explained her experience of living with lupus to a friend using spoons from a café table: each task, like getting dressed or making lunch, cost a spoon, and she only had so many each day. It captured something hard to explain: energy that is limited, has to be budgeted, and doesn’t always come back overnight.
The metaphor spread widely, particularly in chronic illness and disabled communities, and among neurodivergent people who find that social and sensory demands drain energy fast. A related idea, energy accounting, involves tracking what drains and what restores energy.
This site’s idea The program’s battery meter works in a similar spirit: a quick way of saying “I have this much today,” so that plans and conversations can fit.
What the research says, and its limits
Miserandino published “The Spoon Theory” online in 2003. It is a community metaphor rather than a research model. Research on fatigue in chronic illness and autism supports the underlying experience of limited, variable energy.
Also known as: neurodiverse couples, mixed neurotype, autistic and non-autistic partners, ADHD relationships.
In a nutshell
When partners have different neurotypes, many everyday frictions come from mismatched needs and communication styles, not from lack of love. Naming the differences and designing around them often helps more than trying harder.
Going deeper
Common patterns include one person needing more directness and the other using hints; one needing quiet and the other enjoying busy; one relying on routines and the other on spontaneity; one managing the household systems and the other struggling with executive function.
Each person’s natural way can feel like a default that the other is failing to meet. Seeing both as valid, with neither as the norm, is a big shift.
Practical tools that help include written agreements, clear ownership of tasks, planned times for important talks, sensory accommodations, explicit communication about needs, and plenty of appreciation for effort that the other might not see. These are also good ideas for any couple.
What the research says, and its limits
Research on neurodiverse couples is limited but growing, mostly qualitative. Studies of couples where one partner has ADHD report common patterns around household tasks and emotional regulation. The double empathy framework offers a useful lens for mutual misunderstanding.