Level: Linguistics

Rules of dominant, passive, and symmetrical hands

Signs or words in American Sign Language (ASL) can be categorized into three types: one-handed, two-handed symmetrical, and two-handed non-symmetrical.

If you are a right-handed signer, your right hand is the active/dominant. If you are left-handed, your left hand is the active-dominant. Do not switch the active and passive roles of the hands. Stay consistent (even if you are ambidextrous).

One-handed signs

One-handed signs are formed with only one hand; some one-handed signs are body-anchored. For example, orange below. The signer is dominantly right-handed. For right-handed signers, use the right hand as dominant or active. For left-handed signers, use the left hand.

Meaning: orange

More examples of the one-handed signs are: feel, police, doubt, sick-of, deaf, yellow, FLY.

Two-handed symmetrical signs

Two-handed symmetrical signs use both hands in a symmetrical handshape and movement (including alternative movement). For example, WANT, MAYBE.

Gloss: want

More examples: depressed, contact, signing, race, game, book.

Two-handed, non-symmetrical signs

Two-handed, non-symmetrical signs have one dominant hand which moves and one passive hand which serves as a base. For right-handed signers, the right hand is the active or dominant hand, while the left hand is the passive or base hand. For left-handed signers, it is the opposite.

Meaning: sushi

More examples: read, help, investigate, painting.

Now here comes a very interesting discovery as to why some signs have certain rules of movement and handshape.

Battison's Dominance/Symmetry Conditions

Linguist Robbin Battison (1978) proposed two conditions: Symmetry Condition and Dominance Condition on two-handed signs. He identified these two structure constraints which explain the following "what-if" conditions.

The Symmetry Condition states that, if both hands of a sign move -- either alternating or simultaneous, then the handshape, the movement, and the location must be the same.

E.g. bath, maybe, party, play, earthquake, ball, story, etc.

The Dominance Condition states that, if the hands of a two-handed sign don't have the same handshape, then the dominant or active hand can move only while the passive hand stays in one place. That is, the passive hand acts as a base.

Examples: enough, cookie, helicopter, popular, pay-off, octopus, etc. The passive hand of these signs has only one of these unmarked handshapes.

But, but, there are some ASL signs that have the same handshapes, yet the dominant hand moves while the base hand is stationary, such as work, easy, school. Why? Here comes another level of the rule explained by Battison.

If both whole hands with the same handshape are in contact, a passive hand is stationary while the dominant whole hand moves. E.g. school, paper, right, institution, work, proof/prove, how, easy.

If both hands with the same handshape are in contact and the fingers only move, both hands move. E.g. rabbit, starbucks, contact, Austria.

Fascinating, eh? Did we Deaf people invent the rules? Nah, these are the evidence of the natural language of how the brain works.


Battison, Robbin. 1978. "Lexical borrowing in American Sign Language." Silver Spring, MD: Linstok.

Robbin Battison. "Analyzing Signs". Linguistics of ASL. Pp 193-212.

Clayton Valli, et al. "Linguistics of American Sign Language: An Introduction." Washington, D.C.: Gallaudet University Press. 2005. Pp 17.

Charlotte Haker-Shenk and Dennis Cokely. "American Sign Language: A Teacher's Resource Text on Grammar and Culture." Washington, D.C.: Gallaudet Press. 1980.

Related posts

Which right-handed or left-handed should you sign?

co-articulation in sign language

Which up or down is the garbage can?

Enter a keyword in the field box below to search or filter the new topic list and click on the link.

New to sign language? "Where do I start?" or "How do I start learning sign language?" This ASL Rookie guide lists some selected links to the tutorials for ASL beginners to get started and keep rolling. It may be a useful review for intermediate-level learners and ASL students as well.

Some tutorial pages are a mix of free and premium versions. Access to premium content and links below are available in the PatronPlus subscription. More links/posts will be added from time to time.

Expressing needs and wants

  1. Making commands or requests

Talking about activities

  1. Frequency of time: how often?

Are you able to carry everyday conversations in ASL? Are you a student in the intermediate levels and beyond, who wishes to boost up your signing skills? You've come to the selected tutorial series. (Some premium content are available to PatronPlus membership.)

Stories, poems, performance arts, etc. in sign language.

This documentation project follows a child's language acquisition, literacy development, and phonological acquisition in sign language, specifically ASL, from newborn to age five in a natural native-ASL environment and visual culture.