Labor (3) Perception (3) Percepción (3) Trabajo (3) Vision (2) Time (2) Social sciences (2) Sampling (2) Research (2) Quality of products (2) Poverty (2) Population (2) Measurement (2) Id (Psychology) (2) Toma de muestras (2) Factores (2) Calidad (2) Pobreza (2) Ciencias sociales (2) Población (2) Vista (2) Investigación (2) Medición (2) Tiempo (2) Ello (2) Teleology (1) Technology (1) Taxicabs (1) Sociology (1) Socialization (1)