Which of the following are considered to be limitations of psychological experiments conducted in laboratory environments?
a. laboratory experiments allow researchers to have control over variables. b. experiments conducted in laboratories allow researchers to make casual inferences. c. it's difficult to accurately measure the research variables. d. laboratories are artificial environments, so behavior might not apply to the real world. e. researchers tend to ignore ethical considerations in the pursuit of proving their hypotheses.

Does anyone know what my spanish teacher means by this? i need to use plural forms of the verb ser. and she asked me to use a couple of adjectives to describe the boys collectively and then the girls collectively?

Listen to the audio and decide if the statement is true or false. alejandro is tall and dark.

50 points! 1. conjugate each of the verbs below in the preterite tense: ayer, mi abuela (leer) el periódico. los estudiantes (traer) los libros a clase. anoche, yo (enojarse) con mi hermana. julio (dormir) en clase anteayer. 2. below, conjugate the verbs in parentheses using either the imperfect progressive or the preterite. use the model below: modelo: yo 'estaba estudiando' (estudiar) cuando mis padres 'vinieron' (venir) a casa. i was studying when my parents arrived home. ella (bailar) cuando yo (romperse) la pierna. ellos (hablar) cuando nosotros (llegar).