My almost 9 month old screams so much. It's not every day but it's very often. It's these loud, high pitched, screechy screams. Tonight she did it for over an hour. I put her in her play yard to make dinner...screams. I brought her in the kitchen and put her in her exersaucer....screams. Eating dinner in her high chair....screams! Why??

At first when she started screaming, I'd attend to her pretty quickly but now I let her scream a little bit before I get her. I also make sure I stay very calm when she's screaming & I respond to her in a calm, quiet voice.

How do I get this to stop?? Is it normal?