2–< 2.6 years | 2.6–< 3 years | 3–3.6 years | 3.6–< 4 years | |||
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I. Identification of lexical semantic classes | Nouns under noun classes | Receptive | All family members except sister and brother, farm animals, food kinds, body parts, vegetables, and fruits, daily used common objects, clothing items (shoes, socks, jeans), places, wild animals (giraffe, lion, and elephant) | Family members, wild animals (giraffe, lion, elephant, and monkey), birds, plants, insects, vegetables and fruits, clothing items, food, electronic devices, furniture, common daily used objects, body parts, colors, places (house, street, sea, playground) Some means of transportation (car, bicycle, airplane). Some jobs (doctor, soccer mainly) | All means of transportation, electronic devices, places, jobs, places Most colors (red, yellow, blue, white, black, jobs (soccer, doctor, policeman) | Differentiate between birds (chicken and roaster), reptiles, plants, and all jobs |
Expressive | Some family members (mother and father) and grandparents if they are alive Some farm animals (sheep, cats, dogs, and horses), some food kinds. Body parts (mouth, eyes, hands, and feet) Some daily common objects (plate, spoon, money, and keys) Wild animals (lion only), vegetables and fruits (cucumber, grapes, and banana only), means of transportation (care only), plants (flower), and fish Label little of verbs (drink, bath, comb) | All farm animals, fruits, clothing items, food kinds, common objects, and body parts, farm animals, fruits, food, clothing items, electronic devices (mobile, fan, washing machine), furniture (chair, table, door, bed) Some wild animals (giraffe, lion, elephant), some vegetables, some colors (red, blue, yellow, and black mainly), and some means of transportation (car, airplane, bicycle) Birds (duck mainly), insects (butterfly and fish), plants, places (sea only) | All family members (sister and brother) if they have any, wild animals and farm animals, food kinds, vegetables, means of transportation, furniture, electronic devices, colors, plants (flower and tree) Some birds (mainly ducks, birds, and chickens) Little insects (butterfly and fish), little places (sea, a house only), jobs (doctor only) | Most insects and reptiles Some of the places (house, street, and sea) | ||
Verbs | Receptive | Most action verbs | All action verbs | All action verbs | All action verbs | |
Expressive | Labels some of it (comb, play, eat, drink, wash, play) | Labels most of them | Labels all action verbs | |||
Adjectives | Receptive | None | Most adjectives (big, dirty, beautiful, cold, clean, ugly, hot) | Knows all adjectives | Knows all the adjectives | |
Expressive | None | None | Labels some of them (big, small, beautiful, hot) | Labels most of them (big, small, beautiful, clean, ugly, hot) | ||
II. Identify the name of a certain prototype | Receptive | Identify 2 prototypes (food and animal) | Identify 2 prototypes (food and animal) | Identify all prototypes | Identify all prototypes | |
Expressive | None | None | Identify prototype (toys) | Identify the prototype (toys and food) | ||
III. Identification of basic concepts | Receptive | None | Concept of color change, time concept (day and night), some of the place indicators (above and under) | Concept of quantity (more than), size change, and all place indicators | Time concept (summer and winter), the more complex preposition (beside and in-between) is better understood | |
Expressive | None | Can label the place indicators (above and under) | None | Can label place indicators (above and under, beside and in-between) | ||
IV. Categorization | Receptive | None | Can group clothes and fruits | Can group all objects and identify their prototype | Can group all objects and identify their prototype | |
Expressive | None | None | Could group (clothes) | Could group (clothes and fruits) | ||
V. Word relations | Receptive | None | Understands some polysemy | Understand polysemy, some meronyms | Understand polysemy and some meronym | |
Expressive | None | Some antonyms (up and down, small, and big), some reverse verbs (laugh and cry, wakes up and sleep) | Most reverse verbs | Most antonyms (up and down, small, big, sick, and healthy) and most reverse verbs |